The 7AL2 will do the job as well as th any of the other 7 sereis boxes with the proper coil, the MSD Pro Power, Malloru 28880 or the proper # MSD HVC coil for the digital 7 boxes I have used the early non digital 7 boxes on blown motor using 22 lbs. of boost on race gas at 7300 rpm BTW, you do need good plug wires also