I've been playing with this new Denso 120 amp alternator, trying to figure out the best location. The problem is, its a large alternator. The front to back dimension is much bigger than the old 70's Chrysler alternators, and that causes the back of it to hit the end of the cylinder head when trying to line up the pulleys.
This seems to be the best spot for it. I had to lengthen the stock adjustment arm. The factory triangle shaped plate was useless. Right now, the pivot bolt is attached to a quick and simple plate, just for mock up. I'm going to fab a bracket that will bolt to 3 of the tapped holes in the head, and it will rigidly secure the front and rear of the pivot bolt. But, since I have the in-laws over my house for the next few days, said fabrication will have to wait. In the meantime, some pics.