350 chevy ,small cam,carb 17082213 my question is what should the initial timing be set at? i dont work on chevys.iwork on chevy carbs.the air cleaner says 4 degrees . this is a 1982 1 ton chevy van.the engine is brand new i just put it in.when i was setting the timing it seemed to like about 10-12 degrees ive got the idle screws out 3 turns and the apt about 4 . thanks in advance for some answers.