I have a 350 bored 30 over with forged trw pistons, dart sportsman II heads. comp. is at 9.8 to one. has 4ooo miles on it now, runs very strong! has a performer 750 carb, Gm HEI distr. with Accel coil. the best parts ( to many to list) and machine work were put into this motor. Built by M/H ENGINEERING. Notible light grey exhaust smoke noted when reved, especially when in park, some noted during a run. It is very light. is this normal with higher compr. engines? could it be carb. related?may be running rich. cyl. pressure is great.. any help is appreciated. thanks-- Perry

i have a friend with a 350 w/ almost the same specs and his smokes lightly when just started or running at high rpms so i believe this is normal with high compression engines