OK, What in the world, causes gasoline to bubble or boil in the tank?! Running Non-Ethanol, with a bit of "Race Gas" 105 octane.. 440 Six Pack car. Drove a bit yesterday, 70° outside temp, engine temp SHOULD be 190°-195° for a 6 pack I know, however, I'm temporarily running a 180° thermostat. Mechanical pump. No return line. Never had this happen before, In YEARS of driving it. Had gas pouring out of the fuel lines near the tank, seems to be when parked. Cannot confirm its coming from Filler Tube, seems dry. Just had new sending unit installed. Did notice 2 of the short rubber "Go Nowhere/Vent lines"? on the tank were loose. Could have been the problem. But its INTERMITTENT. Only pours gas out when driving, like from 2 spots, about 11" apart. And stops when I park to check it? Weird! Will try again today, maybe the 3 HOSE CLAMPS I installed last night helped?