Figuring out what I'm working with - 3970014

JackD

New Member
Jan 5, 2022
7
I have a 1957 Chevy that I am slowly improving. It's a four-door sedan, which means it'll never be worth a ton. So I'm trying to be cost-effective in everything I do. I would like it to be fun to drive, and reliable on pump gas.

I have only driven it short distances while working on things like lights and brakes. I am just getting into the engine now.

The car came to me from a guy who bought it from a widow, whose husband apparently raced it a little, or wanted to race it. It had traction bars in the trunk. It has a B&M shifter and had a tachometer with shift light blocking the view of the speedometer. I have replaced that with a set of gauges under the dash, including tach. It had a bad gas tank (replaced but haven't run the fuel line yet since I need to weld some floor patches in).

The reason I am posting here is that I suspect the engine is from a 1973 Camaro. The casting number is 3970014. The number on the front passenger side of the engine is T0509CKL. I think T is where the engine was made, 05 is May, 09 is May 9, and CKL means the types of vehicles the engine was intended for. One letter means Camaro, another means Chevelle, and I'm not sure about the other one, passenger car I think. The partial VIN is 13B585996.

The engine is paired with a T400 transmission. I was told it's four-bolt main but have not verified. I am replacing all of the gaskets, so I'll see pretty soon one way or the other. I was told the engine and transmission came out of a 1969 truck. Which is possible, maybe I am reading the numbers wrong, or maybe the engine was transplanted to a truck first and later to the '57.

I have an Edelbrock Performer intake and a Holley 3310 carb. I put an HEI distributor on it.

The engine had a harmonic balancer from a 265 or 283 on it. I speculate that the guy who raced it or wanted to race it swapped that on from the original engine. I am swapping on a 350 harmonic balancer a friend had available. The engine rocked a lot side to side, very visibly (both with the old points distributor and the new HEI distributor). I replaced the motor mounts but haven't put the engine back in since doing that.

It has what I assume to be stock manifolds (stock on the '73 engine, not the '57 car). I have not gotten eyes on the cam and I haven't taken the heads off to look at pistons or cylinders yet. The engine sounds to me like it has some cam. It does crank and run (right now using a 3-gallon temporary tank). That is as far as I have gotten with it.

My question is basically what people would suggest for a BUDGET build and what else I should check. Also any general wisdom people have based on this info.

Again, my goal is relatively cheap fun and reliability. I am not planning a mega-build because being a four-door sedan puts a cap on what the car will be worth even if fully restored.

Thanks for any tips or info! Sorry if this post doesn't belong here. The car is not a Z28, but the engine may be.
 
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Gary S

Administrator
Lifetime Gold Member
Apr 14, 1999
24,984
Bismarck, North Dakota
CKL was a code used on full size cars and A body cars in 1973. The B in the VIN says it was from a car built in Baltimore. Baltimore made A body (Chevelle, Monte Carlo, etc) cars in 1973. that rules out it coming from a full size car, and it also rules out it coming from a Camaro.
CKL was the code for 350/145hp engines that year.
 

JackD

New Member
Jan 5, 2022
7
Thanks - curious what limited it to 145HP and if my Edelbrock intake and Holley carb might have improved the situation a decent amount. Or is it more about heads and manifolds. I don't think the cam is stock, but don't know yet what it is.
 
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JackD

New Member
Jan 5, 2022
7
I also just realized that I was assuming the heads are original, but, I just went out with a flashlight to have a look, and they have 3890462 on them. C 1 6, which I think means March 1, 1966.
 
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tom3

Veteran Member
Aug 1, 1999
15,810
ohio
462 heads with a cam and Holley on top should be hitting close to 300hp depending on the pistons. Does the engine smooth out at off idle higher rpm? Rocking back and forth doesn't sound good, maybe a dead cylinder or two?
 

sandlapper

Veteran Member
Oct 9, 2020
2,563
SE CSA
both the 145 & 175 were rated NET in '73 ... those were surely dish piston motors. (IF) Dish w/ 462's are at best 9.5:1; likely closer to 8.75:1
 

JackD

New Member
Jan 5, 2022
7
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I haven't had much chance to rev the engine while watching it (among other issues, there is a kink in the temporary fuel line that starves the motor under load - will be fixed when I run the new fuel line), but I don't feel like I'm hearing cylinders skip. I am changing the spark plugs while I'm doing other stuff anyway, though. My main suspect with the rocking is the tiny 265/283 harmonic balancer. I am hoping my new motor mounts and 350-style balancer will help.

The pic is my exhaust manifolds post-sandblast. Those are smog plugs, aren't they? I don't have the manifolds in hand, they are still with my friend who sandblasted them.

Thanks for all replies and info, very helpful!
 
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