Here's the thing............IF you get a quality replacement regulator (for the early style wiring, pre 70) you may not gain a thing. The big disadvantage of the pre 70 regulator is that the ORIGINAL types are mechanical relay type. So far as I know all available replacements are actually "solid state."
One advantage "might" be that the 70/ later type is probably easier to find nowadays.
Also make sure if you don't now, that you eventually step up to at least a "square back" instead of a "round back" alternator.
