318 Four Barrel Intake

I have to agree with what's been said. I wouldn't bother with the stock 273 4 bbl. manifold unless you find one dirt cheap. They're not much of a manifold. Pretty much a low rise, single plane 2 bbl. manifold with a mounting pad big enough for a 4 bbl. I had one & it was better than having a 2bbl. but that's about all that can be said.