Pre 1970 vs. Post 1970 Alternators / Systems -- SOLVED IT - See Post # 12

For newbies reading, this post is too convoluted to follow the technicals. There are many posts that explain it better. Search for those by 67Dart273.
A few highlights:
Ignore post #5 description since totally wrong. There is no "two field" alternator. Both types had a single field (coil w/ 2 ends, routed thru brushes). The difference is that round-backs had one field terminal bolted to the case (gnd), whereas square-backs had two isolated field terminals (2 field wires). Caveat, a few late round-backs have 2 isolated terminals. The early VR used "high-side control", i.e. varied the positive terminal, w/ the other terminal grounded. Later VR used "low-side control", w/ positive terminal at fixed 12 V and varied the other terminal. Reason - easier w/ transistors and same used in my 1996 Voyager but Vreg is inside PCM box.

Can I use a square-back alternator by just grounding one terminal? Of course, isn't rocket science.
Why should I? Square-backs output more current, esp. at idle, plus easier to source today.
Can I get an electronic Vreg for a round-back? Yes, $11 at rockauto when I last bought (some PN's above).
Can I install a later "square-back" Vreg? Yes, but will need to run another wire for 12 V IGN to the alternator.
Must I install the Vreg on the firewall? No. I put a later one on the inner fender beside the alternator in my 65 273 since simple and obvious wiring.