I have been dinking around with putting a holly sniper on my originally TBI dual tank that was later converted to carb. I've been searching all over for some information on the fuel pump power and tank switch configuration with little luck... even searching on these forums. I finally found a good reference schematic that made sense in this thread ( @zeig85 ). I undid all of the splicing done to bypass the tank selector switch and installed a T setup with check valves to bypass the tank select solenoid (doesn't take 65psi well) and found I only needed to route my fuel pump power from the holly setup to the brown and white input of my tank switch... which is in the engine bay anyways. It is amazing what finding the right schematic will do. Thanks for archives and allowing me to deliberately bump this VERY useful thread.