72 340 pass side manifold

Nope!! 70 &'71 and up were 1 7/8". If you not going 100 original, I'd swap it for a 96/97/98 Jeep Grand Cherokee passenger's manifold.
And the matching left side manifold is 2.25", is that correct?
Is there any right side 2.25" manifold that exits straight down in the center like 3418623?
I think I have seen some dyno numbers with different manifolds, but I can't find them. What does the smaller outlet translate to in terms of HP or performance?