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LS7 in a 1969 Corvette Convertible (Read 4592 times)
Jan 2nd, 2018 at 1:55pm

69Shark   Offline
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69shark

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How is that for a project?

Well,
Most folks around know that I have been interested in an LS swap for my vette.
Final choice is a GM Crate LS7 plus a 4L75E transmission. Goal is to keep my 69 looking reasonably stock. Stuff an LS7 under the hood and play!

Lets go!
In my mind, the first step of the swap is to provide some whoa before adding all that go. Alan, here was kind enough to help me in what I need to refresh my brakes will a little more capability.

Early 2017 saw me putting new Cryo treated rotors, aggressive pads, and dumping all the rubber brake lines in my baby! She was also treated to a complete e-brake rebuild with stainless parts! Sadly mid install I was called to help my daughter replace an alternator in her Subaru. Doing the simplest mindless thing I popped my back! OMG! I walked her and her hubby through the reinstall of the alternator and almost had to crawl to my truck and drive it home. What a miserable ordeal. I was broken for almost a month! I now have great empathy for folks with back issues. That was my first and pray it was my last.

Sitting on the new quickJack
...

Wheels off and new parts are in!
...

Old setup!
...

Removed calipers
...

New pads, rotors, lines, and ebrake!
...

Spring 2017 finds me LS shopping. Oh how hard it is to decide on crate vs a used motor. My neighbor is a professional mechanic and is pressing hard to get me to buy a used motor from a wrecked vette. Even found a few. Price is tempting. Something in me kept saying don't do it. Just go crate. I was literally slowly driving myself crazy over the choice. My bride finally just told me to be honest with myself and what do you really want? Well, crate. Comes with a warranty, has been tested, and you know the entire history.

While deciding, my new baffled fuel tank and internal fuel pump have arrived and I installed!

I forgot to take pictures but here she is mid progress of fuel tank swap!
...

Pulling the trigger. It would seem GM has a monopoly on the LS7. Maybe price fixed? Who knows. Wherever I looked the price was the same. I even went to local dealers parts department and was shut down on price. No deals. Yikes. I assumed since paying cash SOMEONE would negotiate. Nope. Finally found a rebate on GM motors and pulled the trigger on a connect and cruise kit that included the tranny of my choice, LS7, wiring, and necessary computers.

Transmission is here!
...
then . . . . .
LS7 is here !!
...

September 2017
Time to sell the extremely reliable Ramjet I've had in my baby for years!
...

Craigslist wins again! First person to look made an offer for my motor, 2004R, radiator and fuel tank. Offer accepted. I drove my vette to his house. 4 hours later my car is stripped of the drivetrain.
Buyers garage
...
Work done!
...


We dragged her up onto his car trailer and back home we went.
...

October 2017
My son, neighbor and I pushed the car into the driveway since the engine hoist is to tall for my garage. We bolted the tranny and motor together and slipped the unit into my vette!!!

Note the clutch!
...
Now removed!
...

Engine and trany together!
...

Installing motor mount adapters!
...

Here we go!
...

Hmm, this isn't working . . . .
...


Notice the much steeper angle now! Much better . . . .
...


Unfortunately the oil pan did not fit because of the steering. Dang. So she was to sit in my driveway on jack stands, motor and tranny blocked in place but neither mounted.

Surprise!!!! Doctor visit, surgery, and more downtime. Yes my baby sat in the driveway on stands. for over a month. She even saw snow. Covered. Yes. even set a SB hood on her to protect the motor from the elements.   

So I ordered and received steeroids! Rack and pinion.
Another friend had pity on me. OR maybe it was the car.
Came over and said lets drop out your steering, mount the motor and tranny, and get that car in the garage! Yeah right! I can barely walk. Can't lift, and you'd end up doing all the work, thanks but I can wait. Well, that did not sit with my buddy and under the car he went. The day was nice and I became a tool gopher. Well the ones I could lift anyway. My bride assisted with others. Finally tie rods to rag joint were gone! Pushing the car back in the garage was done by my bride and buddy. I was still broken. FYI Try pushing a car 30 feet with nothing to keep the front wheels from turning! That is a trick! LOL! ( well I laugh now ) OH yeah it was pouring rain by then!

Back in the full little garage. Still wet. Still SB hood. Still sitting.
...

More waiting while my body healed.
Ah Finally the OK to do things.

Put my car back on jack stands nice and high so I can work in her.

Installed the steeroids! Yes!
...


installed accessories!
...


My radiator with dual fans has arrived!
Just waiting for the radiator support rubber gaskets to arrive to put the radiator in!
...


Still a long ways to go but I am getting close!

Pictures come to this post shortly!

Scott


























« Last Edit: Jan 10th, 2018 at 7:15am by 69Shark »  
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Reply #1 - Jan 4th, 2018 at 12:52pm

yellowjacket   Offline
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Wow, pretty impressive Scott! Good write up too. Smiley
 

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Reply #2 - Jan 4th, 2018 at 2:26pm

69Shark   Offline
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Thanks Jack!

Scott
 
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Reply #3 - Jan 4th, 2018 at 2:37pm

68-73   Offline
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I have to admit I have been conversing with Scott quite awhile on this & he finally is approaching the finish line..gonna be a real nice car to drive anywhere anytime Cool
Alan Smiley
 
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Reply #4 - Jan 5th, 2018 at 7:03am

69Shark   Offline
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ATTITUDE is the diff between
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69shark

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Yep!
Alan has been extremely helpful in this process!
I was quiet on the forum for most of this, especially in the early stages as I was aware I might change my mind! LOL!

I started early asking Alan about my brakes and what to do for the upgrade.
Alan shared his wealth of knowledge and experience freely on several subjects during this mod!

I can't say thank you enough!


For anyone interested, the build is purely for giggles!
I may run her in the 1/4 mile just to see one day but that is not the goal!
She always has been and will continue to be a driver!
She'll stay clean and reasonably stock looking!

Big difference will be in the Happy Pedal!  Grin

Scott
« Last Edit: Jan 5th, 2018 at 7:57am by 69Shark »  
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Reply #5 - Jan 5th, 2018 at 7:32am

68-73   Offline
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Newark,Delaware

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It was my pleasure to share, you will truly enjoy the difference I've blown vipers, porches & many exotic cars away. I think we share about the same  power , but your engine is definitely lighter & rev's higher. I do have a 5 spd though. Just be careful for awhile as that much power in a C-3 can be intimidating. Never did take mine to the track especially after I tore the half shaft out with Jack in the car (2nd gear did it), but I suspect it's easily  a 10 second car so I'd only get one run & they'd throw me off the track.
Alan Smiley
 
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Reply #6 - Jan 8th, 2018 at 7:33am

69Shark   Offline
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ATTITUDE is the diff between
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69shark

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Slow weekend but at least last night the radiator went in!
The fans were not mounted in the center of the radiator so I had to move them so they could pass the upper A-Arms!

Scott
 
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Reply #7 - Jan 8th, 2018 at 2:00pm

68-73   Offline
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Newark,Delaware

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Make sure you use distilled water with the antifreeze...it'll keep everything on the inside nice & clean Wink   Did you ever look into a spreader bar ? to beef up the frt end. I bought one for the BB but it wouldn't fit thinking of putting it in the 73 if I can find it Huh
Alan Smiley
 
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Reply #8 - Jan 9th, 2018 at 6:43am

69Shark   Offline
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ATTITUDE is the diff between
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69shark

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Posts: 7197
*****
 
I did not look into the spreader bar.
Half shaft loops is where I was looking!

Those are on the list but still a ways out yet.

Lots of little items I need to do still. All the hoses and wires have not even been touched yet. Fuel, tranny, etc.

That stuff drives me nuts trying to figure out the right sizes etc.

Scott
 
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Reply #9 - Jan 9th, 2018 at 8:32am

68-73   Offline
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Newark,Delaware

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I had a hose (top) on the 73 this summer & because it's a different setup than stock I couldn't figure out the right hose for the replacement. Finally ordered a 1 1/2" flexible hose 30" & it fits perfect.  Stay away from those metal hose as most don't fit to tight where they connect to the radiator or thermostat.
Alan Smiley
 
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Reply #10 - Jan 10th, 2018 at 7:17am

69Shark   Offline
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ATTITUDE is the diff between
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69shark

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Thanks Alan!

Last night I torqued the steeroids all down to spec.
Took a photo and posted above where appropriate!

Scott
 
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Reply #11 - Jan 11th, 2018 at 12:28pm

68-73   Offline
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My u joints binded  a bit..they hit the headed pipe sometimes. When you attach them drill a short hole where the lock down screw goes in so it gets a good bite & holds better when you get it finally in the right position.  I put a tack weld on mine (lazy) Smiley
Alan Smiley
 
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Reply #12 - Jan 12th, 2018 at 6:37am

69Shark   Offline
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ATTITUDE is the diff between
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69shark

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Good idea and I will do that!
Thanks!

Scott
 
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Reply #13 - Jan 12th, 2018 at 6:51am

yellowjacket   Offline
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Tacoma, WA

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68-73 wrote on Jan 5th, 2018 at 7:32am:
It was my pleasure to share, you will truly enjoy the difference I've blown vipers, porches & many exotic cars away. I think we share about the same  power , but your engine is definitely lighter & rev's higher. I do have a 5 spd though. Just be careful for awhile as that much power in a C-3 can be intimidating. Never did take mine to the track especially after I tore the half shaft out with Jack in the car (2nd gear did it), but I suspect it's easily  a 10 second car so I'd only get one run & they'd throw me off the track.
Alan Smiley

I remember that day!  Shocked
For the next year or so, Veda thought you let me drive the blue monster and I was the one who broke it.  Grin
 

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Reply #14 - Feb 1st, 2018 at 12:02pm

69Shark   Offline
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ATTITUDE is the diff between
ORDEAL and ADVENTURE!
69shark

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Posts: 7197
*****
 
Latest updates going forward are going to seem insignificant as there is no visual changes!LOL!


I have installed the starter. Am waiting for a new pulley for the power steering. The one provided hits the A-Arm.

I started wiring the transmission however could not get my hands in to plug in the harness! Had to drop the cross member again to get to the wiring. The tranny coolant lines should arrive any time now. All new 30 amp Bosch relays arrived two days ago including a set of factory made plugs for a nice fit and wiring up the dual fans on the radiator!

Yesterday my H valve arrived for the heater hoses. The vintage air turns off the water to the heater core to avoid heat in the cockpit however this is not ideal on a SB Chevy. Even the LS motors. It is my preference to instead of turning the flow off simply reroute the water back to the return line to the water pump. That keeps the thermostat happy! Included is a spot for another temp sensor allowing two separate controls for the dual fans should I decide to go that route!

I did a trial fit of the SB hood and so far all fits under that hood nicely! I strongly prefer the BB hood however I might get the SB hood painted to match and put it on once in a while as a sleeper! LOL!

So, yes , there is progress albeit slow at this point. I'm literally working one system at a time so I don't forget anything! Also keeps my mind from feeling overwhelmed by the volume of things I still need!

Lastly I work on her until I get tired or get frustrated! Either scene and I just stop and come back when I feel better! LOL! My guitar is a great break when I need it!


Scott




 
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