Leave your stock exhaust manifolds on........the Ram Air manifolds look COOL but really don't add much,if ANY performance....There are guys running 12's through the log style manifolds.
Beyond carb tuning & dist. recurve for MAX performance,I'd toss in a 068 factory grind cam. (455 HO) It will support an A/C compressor at idle & will wake that engine RIGHT UP.
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Eye Candy......garage band?
https://www.youtube.com/watch?v=QUPcHxHRx3s
Go full screen & turn it UP!
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