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Have the heads milled to turn them into closed chambers, that would give you about 2 full points. It would require excessive milling though (.120 thou or so), but you can get iron heads for a dime a dozen nowadays.
Or have them shaved the factory recommended max of .060 thousandths, that would give you about a full point.
Run steel shim gaskets too.
If you cut the deck .120 to make the heads closed chamber you need to cut the intake side .1476.. Not gonna leave much for the valve cover to seal on... Oh, and the valve cover bolts won't have much to screw into...
Minor details 
Just ruin a swap meet 75 dollar aluminum intake or a 50 dollar stock doorstop 
Last edited by GTX MATT; 05/13/13 02:03 AM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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