273 commando HELP!!!

Gasket port the Heads, Intake (If you have the stock carb this Intake hollowed out a little will be sufficient for your needs) and Exhaust manifolds. Be a man and buy some carbide that you feel comfortable wielding, a respirator, face shield, new gaskets, and get crackin! I have seen people cut out the center cross section of the manifold to adapt different carbs for more CFM from up top.. Get a good valve job. Keep the lighter Adjustable Valve train. If you want find a Cam with about .480 lift and near stock duration (cannot remember off top) Keep the dome tops and you shouldn't have to have the heads milled... and don't be shy with the Octane on fill up. She'll love it. You oughta smoke em plenty for kicks with a 904 and 3.55 even with some 245s at the end of a Sure Grip. It will be fun to drive. Get a descent Tachometer as it will be impressive to watch it whip around. That is fun too.