Return fuel system w/ current parts?

Well i would hope that it would leak out of the vent hole, but that is something i had not thought about, thanks

I just don't know if the electric has enough volume to keep up the pace.
Elec = 50 GPH Mechanical =110 GPH. Mechanical will vapor lock, electric my run out of fuel on the top end.

It don't "vapor lock" trying to Start......it happen about 60-80 feet out, but only when it had a good heat soak in the middle of the summer. when i added the electric pump, problem when away.

The combo works, so i want to us it.......but i may have to give up one or the other in the end.