does this sound like a vapor lock situation.start car from cold and fuel pressure is steady at 8 ussing carter meckanical pump.aafter it gets real warm on warm day fuel press fluctuates down to 4 when idling.has bad surge at 2500 but still has fuel pressure.also why would runnin car on warm day then shuttin down. squirters on primary are pulsing fuel for about 30 minites with engine off.this is pro form main body with new nitrphyl floats and viton .120 needle and seats.are .120 seats overkill for 331 making 400 flywheel hp?i think carter hi flow pump is POS anyone else?