Fuel Line Choice and size

You can’t get push rods that are too stiff, too much ignition or too big a fuel pump. Those Holley pumps are pretty much bargain basement stuff. The OP bought nice stuff. It needs a #10 line to feed it. Then he needs to figure out how much fuel he will be returning at WOT and size the return line accordingly. Or he can use a 10 line for the return and be done with it.