[decooney]

Hey,
not to simplify things, but in addition to following the MSD instructions, exact, and the previous advice here, be sure to "check all wires and terminals for loose connections". Do you have a ground strap to the solenoid from the chassis? My friends Unique was running intermittent ingition for several months, and he could never figure out why. He would let the car sit in the garage out of fear of getting stuck on the road. After a long search by several friends of his, I found out that the wire into the MSD distributor had no resistance... upon close inspection, the wire on the pickup coil had barely separated itself. (get an ohm meter! We replaced the coil pickup/wire, and it's worked great ever since. He also added a solid ground strap, and spark went from dim to zap!

Possible Cause in his case (simple stuff):
after mounting the body, he had wire-tired everything tight, and some wires had been stretched and yanked around a bit. The wire into the distributor just got pulled a bit too much one day. The ground strap was a must too. Good luck.

The simple stuff will get ya every time...

Duane