HELP!!!! Got a 1974 Dart with a high perf. 360cu engine that gets excessive bubbles in the fuel line going to the carb. The bubbles start flowing at about 200 -205 degrees and appear to causes the engine to bog down and stutter when rapidly accelerating. Cleaned fuel tank, replaced sending/pickup unit, insulated the metal lines and replaced the rubber lines under the car. Any ideas or questions would be appreciate. Have had this problem for over 5 years and am about ready to give up.