"I need some help" I have a 65 Mustang coupe with a 289. It has MSD coil, New wires, distributor and ignition box. It has a new edelbrock fuel pump and a edelbrock 4 barrel carb. The car runs fine for about 15-20 min. then the idle starts going up and down, or if I turn fast like into my drive way it stalls. Does anyone have an idea what I should look at or change next? Please help

MIke