Okay, so I had to waite till today to do the install as I had to order the gauge for the regulator.
The pump is a little bigger than it looks, the only nice place to mount it, and have room for a high quality filter, was on the bracket that the jackpot mounts to. I was having a hard time manipulating the mounting hardware on the back side of the bracket around the moushtash bar and such, so instead of drilling and bolting I used two beam clamps to mount the pump, it works really well.
I put the regulator up in the front corner on the inner fender which makes all the hoses as short as possible.
So I presurized the system and checked for leaks, it's all good, started the car and adjusted the pre mechanical pump regulator to 3 to 4 PSI and let her run for a while to make sure the bowls on the SU's were not overflowing, again, all good.
So now I wanted to see if Blue's idea of inlarging the return restriction was necessary. I removed the returne line from the fuel rail and put a quart glass jug on it, I turned the pump on with stopwatch in hand, the electric pump alone pumps a quart in 8 seconds thru the return pipe. So thats almost 2 GPM and I think that should be plenty of bypass to combat the vaporlock, so I'm gonna reserve the drilling of the rail as a last resort.
I'll report back on the next hot day.