preston,
one thing you should check, especially if you've had the head milled, is the clearance from the valve and cylinder head.
i don't have the stock cam specs, but in some cases with hypo cams, it's necessary to have the head fly-cut to ensure there's no interferrence with the valve at max lift.
one easy way to do this is to put modeling clay on the head of your valves, install the head with gasket, then carefully hand-turn the engine over. then, remove the head and check the thickness of the modeling clay.
careful! if you feel resistance as you're turning engine over, stop..something's wrong.
the most accurate way to check clearance is with a dial indicator on the valve life, then a depth guage on the combustion chamber.....
