i just picked up my block, heads, and stuff from the machine shop today. when i get home and look at the heads, i notice they are different from eachother. they have the same size valves,2.02/1.60. but i'm worried about the differences in flow and combustion chamber sizes. here are the casting numbers from the two: 333882 and 3998993.
if anyone can tell me if they are or arent compatible, please tell me! i have spent a lot of money already in this rebuild.