the key take away from my comment is "if done right". Anything can be crap if done poorly. there is a reason I do my own work whenever possible, even if I have to teach myself how first. I find that most aren't as attentive to detail as I am and I seriously hate hack jobs. My 51 must have had one of those coworkers you mentioned working on it. I have found many hacks on it and I am fixing them as I find them. From axle flange nuts finger tight with only the cotter pin keeping it from spinning off, to lower brake pivot bolts with a 1/4" gap between the nut and the backing plate, to a new wiring harness spliced into the old and a pushbutton start cobbled into where the cigar lighter should be. I'm not advocating replacing usable original threads, but if it's not usable I prefer to use an insert to keep the correct bolt in there rather than going with an oversized one necessitating a further mod to the pump to make it work.