Just a thought...since your front end is "disassembled for the winter", what kind of shape is your wiring harness in? After over 30 years mine had been hacked and cobbled by previous owners, there were incorrect terminals, corrosion, melted insulation...all of it worked, but it had seen better days.
When my engine was out I took that opportunity to run new engine and front light harnesses. I ordered them from M & H Electrical Fabricators, and they built a new harness for me with all the right color wires, terminals, securing points, etc. but modified it to use an internal voltage regulator alternator. Looks clean, fits right, works great. Per their suggestion I'm running an alternator from a mid 70s Pickup Truck w/air conditioning. I don't know what amperage that is but apparently it's a stock (read that inexpensive) heavy duty alternator. They would have modified it for an HEI distributor too, but I wasn't sure if I was going to go back to a stock looking distributor and put electronic internals or not.
Again, it's just a thought.
'69 Garnet Red Convertible, Ivory over black, 350 w/turbo 400