right now im running the apexi turbo kit on my sohc and have bout 5 miles on it. a welder at my work that build cages for monkeys says he can make me a equal length manifold for next to nothing. so i was wondering if i should do it. would it benifit me any if im only boosting 6psi? if so where can i get a manifold flange from?

 

how much? and will it be ac compatible?