Driving Project 69 Chevelle L78

[cook_dw]

Legit stamp IMO.

[firstgenaddict]

Yea I agree on the stamp... if you pull the engine apart take pics of the gasket marks on the deck...

FWIW a KK rear end is WAY more valuable than a CF... double or triple, however L78 with 4.10 is brutal.

[sixt9rsx33]

Originally Posted by firstgenaddict

Yea I agree on the stamp... if you pull the engine apart take pics of the gasket marks on the deck...

FWIW a KK rear end is WAY more valuable than a CF... double or triple, however L78 with 4.10 is brutal.

I agree James, but my Gold Z has a 4.10 rear and it is just not reasonable to drive except around town. On the interstate it is a joke and at 60 miles per hour it is screaming and I am getting dusted by all the other traffic. So will be interesting to drive the car with a 3.31. A 3.73 is not as bad.

[wheelhop]

car was built on my birthday

[Postsedan]

Yeah, but your waaaaaaay older than that

Dan

[wheelhop]

Youre not far behind

[ssl78]

What trans does the build sheet say it came with M20 M21 or M22 that would be a clue of what gear originally came in the car

[Mr70]

I don't think that will help John,as all three 4 spd. transmissions behind this Chevelle could've received a 3.31,3.55,3.73 or 4.10 gear back then from the factory.
I suspect someone swapped in the rear axle tube afterwards,who didn't have access to that partial buildsheet,or if they did,they weren't savvy to noticing the G80 & G84 notation of 4.

[sixt9rsx33]

[QUOTE=Mr70;1366286]

I agree, I think someone swapped out the rear end, but many years ago. The car per the seller has not moved in 30 years. The last inspection sticker on the front window is 1987. The amount of gunk that I had to scrape off the axle tube had been there a long time. I am guessing that someone got the car with the 4.10's and said...oh hell no I can't drive this thing with this gear and put a new rear end in the car. I say this because the date of the rear end is consistent with all the other date codes of the other parts on the car. Or under the more unlikely scenario the car was born with a 3.31. I am guessing, seeing that the car still has the original engine the 3.31 may have been in the car for a long time. Not saying that an original engine can't remain with a 4.10 but perhaps the 3.31 helped along the way??
So I drove the car for the first time yesterday. It runs like a bat out of hell even with the 3.31 gears. I was amazed how well it ran. Did not drive well though!! Front end needs work but shifted well and started right up.

Lawrence

[sixt9rsx33]

Can I fit a 275 60 R 15 under the quarters on a 69 Chevelle? Right now the car has old 255's on all four corners.

Thanks

Lawrence