I posted last summer on this and went through all kinds of hell trying to figure out whats going on. I checked ignition and fuel, up and down, inside out. I think I found the problem. Is it possible the valves are hitting the pistons? Its a 71 351C 4V cc heads and TRW 030 over pistons. The Valves are stainless manleys. The cam is Lunati # 41113. Intake .576 lift 310 dur exhaust .574 lift 320 dur. I think it maks about 10.7 compression but Im not sure on that. I hav not pulled the heads yet but hope to in the next 2 or 3 weeks. If the valves and pistons are hitting, how much do I need to cut the reliefs in the pistons or can I purchase pistons with reliefs already cut? Any ideas out there?
<font size=-1>[ This Message was edited by: ddShelby on 2/3/02 11:17am ]</font>