My friend has a 1972 Mach 1.He has recently had the engine, transmission (c6?) and rearend rebuilt. The engine 351 cleivland that had been bored out to 383. It has a Msd 6al ignition with the MSD distributer,coil,and wires. It has a holley 650 carb. The car ran fine up until we put the Msd...