my current build has .040 lp pistons and block decked .030 with guestimated compression at/below 9.5:1. 1.94 valves, no lumps, Langdon split manifolds, offy intake with dual webber 32/36 and Clifford 264 cam. HUGE improvement over the stock 250 but not all I had hoped for. the cam is only 206 @.50 and this concerns me. I have ran a comp cams 268 (218@.50) in a 250 and was not at all over cammed. I suspect the cam is my biggest issue but need advice. lumps? are they worth the effort on something that will never see 6k? I know the offy is less than desirable but am limited on space, it is in a '64 chevy van and Clifford intake would be very hard to make fit. I have considered adding lumps, some porting and decking the head but unsure of actual gains so looking for input on all or anything I am overlooking.
