340 no can start

A few years ago a buddy rebuilt and hopped up us 70-390-javelin. Brand new Garner exhaust, etc. Popped in a new MSD distributor, everything was new in the motor. He got backfire and blew a very expensive muffler. Tried everything, had spark, timing right. had another very knowable car buddy come over.....same issue.

One thing I noticed off while working on the POS, was an unusually wide gap in his distributor. I put in an pertronix, and its around .030. His visually appeared to be a .100. After some online checking on my phone, sure enough, gap was suppose to be .030. Had to send the distributor in for another one. MSD does not always mean quality....