Hi, I usually can solve most mechanical problems but have reached a point where I'm just getting tired and am needing some suggestions to make some light bulbs go off in my head. So here goes…. I have a 1957 D100 with a 1978 360 four barrel that was my daily driver. Over a year ago i was deployed to South Korea, and the plan was for the wife to start the truck up very couple weeks or so until i got back, well that didn't work out to well, since she ran it out of fuel after about a month. so for about a year the truck sat in the driveway until my return. I tried getting it started but it was not getting spark. So I traced it down to a bad coil (don't know why it failed from sitting, but it did) after replacing the coil it fired right up with some new gas. Now after about a 15 minute drive the truck starts acting like its going to stall on acceleration up to about flooring the pedal then it acts fine, it even back fires. when under 15 minute drive when shut off and started back up it does it worse. so my conclusion is heat is the issue along with a restriction. The truck acts normal at idle and full throttle but not in-between. So I rebuilt the 600 cfm Edelbrock a week ago thinking it would fix the issue along with changing out the fuel filter also moved the fuel line further from the block/headers but it did nothing. The whole system tank, lines, pump, carb are all under 5 years old. starting to maybe think its electrical. But i can't see it being affected by heat. The truck had no previous issues with vapor locking or anything close to this problem. Could the new coil be affected by heat and cause an intermittent problem? I dont think so but right now I'm really scratching my head. Heres the specs: 360 engine with electronic mopar ignition/ distributor. metal lines running from the tank to the filter then rubber fuel hose to the mechanical fuel pump. and then from there rubber fuel hose up to the 1406 Edelbrock 600 4 barrel.