Cheap a set J heads with 2.02 valves or the stock 360 heads with 2.02s Set your timing to have it all in by 2000 and total near as possible to 44 degree if the engine can take it.Use a 180 stat the 160 in that engine will cost you time except on a very hot day By the way a set of thin head gaskets will help in the power dept and headers are a must unless you have the early exhaust manifolds then use a 2.50 max pipe, and set of cutouts