DUAL WALBRO 340
A Hobbs Switch and Relay energizes the 2nd pump when the engine is no longer at vacuum.
I'd think two pumps running all the time wears one unneccesarily AND heats the fuel more.
More pressure through the lines all the time, too.
Click the link in my sig if you want to see more pics. I will work on the shop owner to put a dual package together for the LS1. He is quite clever with this sort of thing.



