I just bought an 84 chevy 4x4 shortbed that the guys brother apperantly put a 350 bored 30 over with edlbrock carb,intakeand cam it runs ok but seems alittle under powered and occasionally pops out the carb at low rpms when driving , dont know what year it is . could any body tell me what to look fir for a year , type of heads and the tune up specs (altho Ill probably have to do that by ear ..ouch)