No stamp on heads??
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Teching In
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From: Kentucky
No stamp on heads?? 
Just picked up a 1998 trans am. And there’s no stamp on the heads indicating what size they are? I’m guessing factory but I have no idea.
Last edited by Tcombs911; Jun 26, 2018 at 11:33 AM. Reason: Added another picture of the heads
whats the history of the vehicle? was it from a dealership or private owner and if the latter, any idea on how many previous owners were there? did the car come with any mods done to it? from the 2nd to last and last pic, looks like the car has headers and not the stock manifolds.
Thread Starter
Teching In
Joined: Jun 2018
Posts: 6
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From: Kentucky
whats the history of the vehicle? was it from a dealership or private owner and if the latter, any idea on how many previous owners were there? did the car come with any mods done to it? from the 2nd to last and last pic, looks like the car has headers and not the stock manifolds.
the heads also could had been removed and swapped with a different set of heads and put back on opposite sides. see if there's any numbers on the ones near the firewall. will prolly have better luck looking at the heads on the driver's side.
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Looks like an Iron block from the picture? Maybe just dirty If so then its probably a 4.8/5.3 and someone scraped the numbers off the heads so it wouldn't be a dead giveaway
Or maybe there some ported heads and thats the way the person that ported them stamps his LS heads lol
Or maybe there some ported heads and thats the way the person that ported them stamps his LS heads lol
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Teching In
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From: Kentucky
THat stamp doesn't actually tell you anything. The casting number is located on the back of the block on teh drivers side, just behind the cylinder head. Just below that, inside where the bellhousing bolts up, it has a stamp indicating the displacement of the motor.
However, nothing will REALLY tell you anything unless you do some disassembly. Motor could be bored, stroked, etc. WHat did the previous owner say was in it?
However, nothing will REALLY tell you anything unless you do some disassembly. Motor could be bored, stroked, etc. WHat did the previous owner say was in it?
Thats always the first thing I check before buying, could be a 6.0 but like I said earlier Im almost certain someone just scraped the numbers off of some 4.8/5.3 heads so no one would be able to tell what was in it. Ive seen it MANY times were people try to pass off a 5.3 swapped car as a LS1 but never seen someone scrap the numbers off the head to cover it up.
Last edited by Ls7colorado; Jun 27, 2018 at 10:32 PM.