looking for a bit more power any advice?

[jrcaprai]

Originally Posted by 85Bowtie

I didn't see anyone mention pistons. You need to select a set of pistons that match your head chamber/cam/compression ratio that you intend on running.

You want a piston at or as close to zero deck as possible. A closed chamber head with a flat top piston at or near zero deck with a ~0.039" gasket will give you good quench and depending on the piston/chamber volume will determine you CR.

In general, when using aluminum heads you can, and are recommended, to run a point higher in CR because so much heat is taken out of the combustion chamber. If you're using the XE268 or whichever cam was mentioned earlier you're going to want ~10:1 CR. That would be similar to ~9:1 in a steel headed engine.

This is if you really want to get into the engine....if you just start slapping on heads and installing cams you might not have a perfected combo.

If he changes pistons, he might as well start from Scratch and build a 383...
If you get a set of 64cc chamber heads, it should put you about 9.5 to 1 Compression, which will be just fine for what you are doing.

He may not have a perfected combo, but it will still run like a raped ape.