I have a 355 w/ edelbrock 650. Mallory FPR and a tbi tank/pump. Sometimes I will be driving and if I let off the gas it wants to die but if I am accelerating it runs great. I was in my driveway setting the idle and tuning the carb and was perfect. We drove about 5 miles to my flexing spot and started having issues. Let it sit for about 10 mins and everything suddenly was fine? Then It started it again about 10 mins later. Then I drove it home. Everytime I let off the gas it tried to die. Pulled into my drive way and all of a sudden everything was fine. While I was driving I could feel my fuel lines pulsing (the passenger checked) And the fuel pressure gauge was jumping (it is right after my FPR). Then in the driveway all was fine again. Is a fuel pressure regulator supposed to be mounted close to the carb. I have mine mounte right after my tank so that I only have the input fuel line running to the front of the truck instead of the input and return. Could these be the reason my truck sometimes wants to cut out?