Was it installed properly? not 1 or 3 teeth off , or anywhere else you thought it might go? High compression, high rpm this has to be on the money no exception or you'll get spark scatter/misfires at rpm. It has to be "in phase" by the book. It doesn't hurt to go back through and line the balancer back to 0 , pop the cap and verify the rotor is pointing at number one tower that the book describes as number one. If pointing near 6 roll the engine over again. I would stick with the Accel, MSD is not what it once was. I have used those same distibutors multiple times up to about 10.0 compression. Adjustable advance slots and adjustable vacuum pod. Pretty good bang for the buck.