Sorry to be late to the game, but the rich running has to do w/ the head temp sensor behind the LH cam sprocket. It (should) run in a warm up mode until that reads 120deg F. Mine always sounds raspy and studders badly until it switches over to normal mode.

Need more advance than that, mine always ran in the 20-25 deg range (at idle).

AFM adjuster is a placebo I think. I messed w/ one at the dyno once and couldn't see a lick of difference on the wide band. (so we cranked fuel pressure up & down to tune it).

OE coils seemed to work well for me. Never blew the fuse you describe except when the O2 lead got loose, melted on the exhaust & shorted out.

Matt