Stop in for a cup of coffee

Mattax said
That's the risk.
Changes in fuel composition in the early 70s killed some rubber parts. And that happened again a few times after that as Im sure you know.

There are some guys who rebuild fuel pumps, have parts, and/or will uncrimp and recrimp the crimped types.

Mancini had rebuild kits for the after market carters. Not sure if they still do. Watch out for the spring force. Its too high on some of the Carters. Should max out around 6 psi, not 7 or over.

And be prepared to deal with high pressure. Check the pressure to make sure. Mopar Joe a buddy of mine replaced the pump on his 383 with a Car Quest replacement. The damn thing always ran rich, black smoke, loading up etc. Joe is one of those guys that doesn't diagnose the problem just goes another direction. He had a 500 horse 440 built. When we swapped the engine, I transferred the pump to the new engine. It ran pig rich as well. He had a stock car buddy come over one night to tune the AFB but couldn't lean it out far enough to make it run right. I got thinking that the pump was transferred to the new engine. We checked the pressure and sure enough it was 7+ pounds. AFB's only like 5# tops. He went to Car Quest and bought another pump, put it on and it was 11# right out of the box. A regulator fixed the issue. So be aware. Sorry for the long story!