Ok,heres what I got,Double Pumper,1-307 & 1-340,1/2 feed,3/8 return,fuel pressure will spike to 50 psi WOT,25#'s of boost.& then quickly settle back down th 40 PSi,I have checked both pumps to make sure they are coming on,regulator is holding 80 psi,I even teed boost gauge to the regulator vacuum line to rule out ant leaks coming from the vacuum block & im still seeing 25#'s of boost with it hooked that way?when I block the return line with the primary pump,FP goes to 65psi,the secondary will go to 70 psi,could the pumps be the problem? im thinking the pressure should be higher than 65 & 70 Psi with the return pinched off?