The problem here is that a lot of people have never seen a cop car alternator. Having rebuilt several of these in the day, what Nitrous is saying is spot on. The only way to get a high current connection is through a 10 gauge (8 is way better) direct to the block.
I have not seen a cop car alternator in the rebuilt market. That is why we did our own in the day. The only wear items are the bearings, brushes and diodes. When we had a bad alternator, we shot gunned them and replaced all of the above parts. We did have one with a short in the stator and we took that to a motor winding shop (try to find one of those today) to be redone.
Craig