i have a 1974 blazer, for some reason my passenger side pops, i have replaced spark plugs and cables, changed fuel filter, i cleaned out the carb, and it still does the same thing, could it be timing? it never did this before, i upped the timing from 8tdc to 11tdc, i have an edelbrock 650cfm performer, performer intake, umm any other questions you can ask to try to help me out
thanks
Robert
