What heads would make more hp? Or would it make that much of a difference? TIA.

 

243 0r 799 casting heads will be an upgrade over the stock 706/862 casting
unless you go with CNC ported heads

 

If your referring to this cam from an LS6

204/211 .525/.525 116

There are better cams that will get you more power.

If you use the 799/243 heads you should mill the heads to get the compression up to see the gains from the heads.

 

I have the 862s now. Would they be better than the 243s after P&P and bigger valves with the same z06 cam?? Thanks again.

 

They will flow more then a stock 243 after there ported.

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I talked to a machine shop today and the guy said he would clean the heads up real good and lightly port them.. what is a good price for doing such??