This is my dilemma:

I have a 1971 Fury I 440 HP police car that needs a new fuel sending unit. The original has a 5/16" fuel outlet and 1/4" fuel return nipple. OEM part number is 3621608. This is a four vent fuel tank system with E.C.S.

The only senders I find available for C body do not have a return line For example part number 3420849.

Does anyone know if my part is available?

Thank you in advance for your reply.