If the trans breaks with a 184, it was gonna with a 155. Decent setup(or lucky enough to have a good one), and not stomping the shifter like it was a scorpion usually lets them live quite a while. The ridiculous kicker gear train, specifically the POS design of the small gear that wobbles around in the clutch basket, now those are a replace often part. A Tak decomp cam, and not flailing away at the kicker even lets them hold up decent. You also need to remember that the engines cost importer $300 or so, and not to expect miracles.