which lt1 head gasket??
 

putting P&P stockers back on and would like to raise the compression a tiny bit. what gaskets should i get? if anyone has a link to there thickness it would be great. thanks in advance.

if you want to raise the compression, use Impy SS gaskets

I was just gonna say exactly what Zack said. Impalla SS gaskets are thr right choice for what your looking for.

impy SS gaskets :thumb:

i ran them on a stock motor making close to 12:1 c/r with 150 shot of nitrous and they held up just fine ;)

What about if you went to GM couldnt you get Impala SS heads gaskets? Would they be the same thinkiness as impy? (whatever that is)

ya the impy is an impalla ss for short. you can use the GM gasket made for the impy with no problem. the stock gasket is 39 when the impy's is 29. it will increase compression from 10-4 to 10-5 only. not much but why not do it with the heads off

thanks for the impalla ss tip. how about going with a copper gasket?? would that be thinner and give me another tenth on the static cr? i am guessing this is one place NOT to use something from a tube??

It's actually .3 compression ratio points (vs. the Felpros, .6 vs stock). Well worth it if you've already got the top end apart.

http://www.smokemup.com/auto_math/compression_ratio.php

what year impala gaskets would you ask for

1994-1996

Aren't the Impalla heads cast iron? And if so how do the Impalla gaskets hold up to the different metal expansion rates of Aluminum on one side of the gasket and cast iron on the other. Wouldn't the different expansion rates of aluminum and iron cause unwanted friction of the gaskets.

Just wondering.

I'm also in the middle of preparing for a head/cam swap. I was originally planning on Impy gaskets, but after reading several posts discussing the above concern I'm leaning toward Felpro.

Is the benefit of incr. compression from Impy gaskets on a NA 380rwhp car worth the above risk (if there is one)???

FWIW...

Stock Compressed thickness = .049"
Felpro 1074's Compressed thickness = .039"
B-Body Compressed thickness = .029"

why don't you mill the heads down?

I've ran the Impalla SS h/g on my car for the last 4 years as a daily driver. I've put over 60k miles with them with that hp level. Lot's of people run them on daily driven heads/cam cars without problems.

So to answer your question, yes it is worth it IMHO.

Mike