ElkySS

iTrader: (6)

how much shorter do the pushrods need to be?

James Montigny

iTrader: (13)

You've only reduced the thickness of the head gasket by .022" (about .017" impact to pushrod length)
That alone should not cause you to use shorter pushrods. (typically sold in .050" increments)

The only way to know for sure is to use a pushrod length checker.
I wouldn't bother with it unless you are also upgrading valvetrain or using shaved heads or a decked block.
(In which case I highly recommend measuring and checking sweep pattens)

C5042081

iTrader: (5)

mine came out to 7.150 from the stock 7.2,(using 7.1) with the gaskets and the heads surfaced,but what james said ^^^ use a pushrod checker

JoeliusZ28

iTrader: (2)

gaskets alone shouldnt require shorter pushrods, but always check anyway.

joer6

i have done it. and also shaved the heads .010. still using stock push rods

BigZee71

iTrader: (5)

Sorry old post I know. But what gains could be expected from having the heads decked
.01 and using the impala head gaskets? What would the compression bump up to with a stock motor and these changes.

Thanks, and sorry again for bringin up an old post.

RamAir95TA

iTrader: (2)

The head gaskets alone would bring your compression up about half a point, and the additional .010" would add another point or two. You'd probably end up around 11:1, but that is purely speculation.