So when I was driving the duster Saturday night to a school dance my dad, someone's pissed off mom, and one of my teachers said it was throwing flames and sparks. out of both pipes. It spit flames with the manifolds before but they were small and only out the drivers side bank, so I did not have high hopes it would do it with longer tubes.
but DAMN I was wrong!
F-it, send it! Haha I had an old Chevy truck in-line 6 that did the same thing. Even had cops called on me one cold January morning cause the neighbor thought someone was shooting guns.
that said, probably off a bit on timing, get ya a timing gun. At least that’s my guess