I have a electric fuel pump it wired from the battery to a switch and directly to the pump should there be a 30amp relay wired in or is this all right it has a fuse but that is it? It is a 1972 camero with a 383.The pump is a holly.Thanks

Definitely should wire in a relay. That switch is probably not made to handle that load.

It must have a relay and fuse.

Thanks for the help.