the one issue with the high output alternators is support. Back in the late 80's I had one made by Wrangler Power Products for a Mazda pickup I was driving. No one locally could repair it if something failed (and it did), you quickly learn to carry a backup stock alternator with you when going in the back country. Also, the support from the companies themselves, hopefully has improved, because back then it sucked. The upside, the kit was very complete, and mounting support was marginal, ended up taking it to a local 4WD shop and having them look at the install, they supplied me with Chevy starter shims to adjust the alignment.
I know that in recent years I was looking at this option again for my Dakota, Mean Green makes one for it, and there are a couple of alternator shops in my area who have limited support for the units. This is something I would look into, support once you purchase it and get it installed. Look into rewinding yours or buying another one like yours and having a local shop do a ful rebuild and upgrade.