My car runs just fine down the highway and even on the interstate. When I jump hard on it, it starts breaking up really bad. Any suggestions? I have a 350SB with a edelbrock 600 carb a MSD 6A ignition & a MSD Blaster 2 coil with a MSD pro-billet flat top dist set with 1-silver(heavy)spring & 1-silver (light) spring with timing set at 34 degrees BTDC. I'm puzzled that the car runs great until you really jump on it.