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Hi again! Not going to fudge with fudging headers on the 72 400bb. Stock manifolds. No hp mods save for this, hei & ignition timing. Just going to run a dual/h pipe dual muffler setup. I'm going for deep(er) tone and better flow mufflers (walker's?) Does this squarish motor like anything...

...1972 400ci 2bbl to a four barrel setup? gasketing issues? Warped surfaces? poorly machined new parts? Thanks!~ dave