Running a converted alternator

^^LOL^^ I may have screwed THAT up. So far as the alternator output difference, there were all sorts of output variances, from 30A or so to 60 or so. The larger output ones are what are hard on your wiring/ bulkhead connector, as in the article.
LOL. I drove an '87 Dodge masons dump at work for more than two years and couldn't tell you for the life of me what type of gage it had and I do remember looking at it once in while when raising it. It was rusty and would sometimes pop out of 3rd but was great to drive.