Alternator Wiring Question
Well that's a mess and will cause trouble at some point. Take a look at some of the threads on how the wires are typically bundled and supported, as well ones on crimping and splicing. '65 has a unique bulkhead connector - similar to '63 so any comments, claims and generalizations do not apply. However we've seen those damaged too - anyhting can be abuse. My point was it will be useful to look at the '65 specific bulkhead connector info if you need to work with it.
Looks like an OEM ballast resistor on the right inner fender. I'd ohm it and see if its good. For an OEM look you can find a busted one and hang it for looks in the right spot or run a wire inside (its busted anyway) connecting the terminals. The Hyfire is hard to hide! I see four wires on the battery positive? Can't see the alternator enough to comment further. Maybe it has the right brackets for a mopar alternator, maybe not. A Denso alternator is not a terrible option either.