Quote:
Originally Posted by hubarlow
"1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust." Did I read that right? You found a 4 barrel intake for the 305? Where? Watched one of the videos with the GMC. You drive it like I drive mine. Every day.
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Actually GMC did offer a 4bbl dealer installed option on V6 Magnum engines. The 2bbl Magnum manifold already has a square bore 4bbl plenum, it's just a matter of milling the top of the base and opening it up. Here's pics of a square bore and spreadbore versions I've built.
