Did I slip a tooth?

Switching the wires won't hurt my MSD box?

Google rotor phasing. This is the third time I told you this. I have no idea if this is the problem, but you said "ran crappy" that kinda sounded like it. What happens is when you switch wires on the pickup the WRONG way, the spark timing MOVES in relation to the ROTOR position. The spark has to jumper further and it can CROSSFIRE to the adjacent cylinders