You can also use a .015 steel shim head gasket to help a little with compression. Watch the rocker oil feed slot on the heads when milling. When they get milled to far the slot goes away and it needs to be slotted again. You won't get oil to the rockers. You can look at the thumbprints in the heads and see how deep they are.....and tell if they were already cut. Intake fit and rocker geometry can also change. Just something to be aware of.

Stock with 9.5:1 comp your 270 hp @ 4400 rpm and 390 tq at 2600 rpms.