Slant 6 Turbo 68Dart Project

Your fuel pump will make a pressure spike right where it attaches to hard line. You are totally exceeding the capabilities of your hose. Get some push lock. This stuff works on everything and it you use the right fittings. no clamps
http://www.jegs.com/p/JEGS-Performance-Products/JEGS-Push-Loc-Hose/764426/10002/-1