Anyone know what size the hardline is on the stock fuel system? I've started working on my dual lift pump project. I think it is 3/8", but I'm not 100% sure.

 

I think your right. . .going to 1/2" would be overkill, unless your running mega HP.

 

Well I ordered all of the fittings and a Walbro pump today. I am going to use the in-tank pump as the back up pump. If the Walbro fails, it will switch over to the in-tank pump until I can replace the Walbro. At least it won't leave me stranded on the side of the road or tear up the VP44.

 

stock line is 3/8"

 

So the fuel now goes through the in tank pump, to the Walboro, to the VP-44 - right?

Is there some sort of manual switch, or will it switch automaticaly?
How are they wired up?

I thought you were going to use 2 Walboro's?