The previous owner said that he had different heads installed on my car. I can tell they definitely aren't stock, but can anyone determine maybe what they are? If so, maybe any type of performance gains are expected from them? Just trying to piece together the unknown history of the car, haha. The picture is the only distinction I could find in terms of stamps or markings. Thanks!

 

72 350

 

is it 72 because of the A on the head there? I know 7s could also be 71s but just making sure

 

The car is a '72, but the guy mentioned that the engine might not be original. When I get the chance, I'll try and look for other sources of identification on the block and whatnot. He said that the heads weren't original, but I wouldn't know, which is why I asked here. All I know is the car definitely performs better than my Dad's bone-stock 350 Rocket.

 

Does the block have your VIN on it? That is how you know if the block is original, and what year it would be from.

 

Where is the VIN located on the block?

 

Correct. #7 were 1971, 7A were 1972. The casting number above the center two exhaust ports is the same on both.

 

Okay, so that means they're probably stock? I haven't talked to this guy much, and it seems he can't seem to remember half the things he's done to the car. He could be BSing, but I'm just trying to figure out why it's faster than my Dad's.

 

https://classicoldsmobile.com/forums...s-engines.html

 

Are your feet bigger than your Dad's??

 

Lol! Actually, yes! I can't wait for the day I get the time to tear the whole engine down and rebuild it. That'll answer all my questions!