Difference in fuel pumps?

The bend may or may not make any difference. Any way you can take a pix of yours in the same orientation as the pix I posted? That is just to see if maybe the back part of the arm is too low, compared to the one I showed. A real pix of your pump straight on from the side would help to see if that is the case or not. Is the arm 4.5" long from the mounting flange, with the arm's angle at the eccentric being 3.25" from the flange?

See if there is a PN on the box. The Carter site shows an M60514 pump for a mid 70's small block and M60519 for mid 80's. (Just a different inlet nipple orientation.) I see AZ has a Delphi brand part listed that looks like your photo. PN AMF0048. I think I'd try the M6866 that sireland67 refers to above.