I am new to group.This is one of the best Bronco sites I have been to.I have an 86 full sized Bronco with a 4.9 6 cyl engine.I have a spare moter on an engine stand that I am going to rebuild because the one in the bronco has 219000 miles on it.It is still running great and I am not going to mess with it as long as it is running so good.But when I do,I have an Offenhauser dual plane 4bbl intake manifold for it.What size carb should I put on it? I have been thol the 600 Ededbrock is a good one and I have also been told to use a 390 Holley.Also would a stock cam work with either one of these set-ups,and should I look into a set of headers?Thanks,TAZZ