Had this happen on a hot sbc, pull the rubber plug and let the fluid out of that filled gauge. Do this first before chasing it any further. Of course most recommend no filter before the pump, unless very hi flowing. I always, way over due my filter size and run it between the tank and the elec. pump never had a problem, makes the pumps last longer. I have two 1/2" canister in line steel filters on 3/8" pipe outlets on my elec. fuel inj. pump, no problems.
