I have a 79 CJ7 that I tried to do the GM HEI distributor mod and now the engine runs, but misses alot and backfires. I tried to adjust the timing, but it doesn't seem to help. Does anyone know what else to try.
There is someone in my head but it's not me
01 TJ SPORT,d44 w/true-trac in rear, 4 in. lift, 33's