Nice setup!
I’m running something similar with a LD4B, 1406, 72+ 340 manifolds, dual exhaust w H pipe, Chrysler 4 bbl kickdown, 302 heads, smogless (advanced curve) distributor from Trailbeast. My 318 runs a lot better now compared to when it wheezed with the 1975 setup it was born with.
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I don’t think anyone will slag the LD4B but they are not cheap anymore…. The asking prices for when they are posted here now are unreal compared to when I bought mine 6 years ago.