Alternator Rebuild Kits
These guys carry a lot of parts and some very high output stuff. Good tech info scattered throughout too.
I put a high-performance CS144 in my '70 RB with one of their adapter brackets. The thing puts out 115 amps at a slow idle. and can pump out over 200 amps at a fast idle if needed.
https://alternatorparts.com/#dodge-chrysler-type