Carb is Edelbrock 4bbl. I think it is a 500CFM.
When I look in the Classic Industries catalog I don't see a replacement listed.
<edit> It is a single line fuel inlet. Though it is not an original carb, it is the original sending unit and it works fine except for the fact that it does not send a signal to the fuel gauge, which is a pain I want to correct. Can I simply measure the tube inlet at the carb and go by that?