That's awesome that you found a canadian distributor of those terminals. They have a lot of other nice stuff on that website as well. But you have to have a commercial account to place an order.
I found an alternator wire extension socket from Motormite at the local Partsource for $6 and managed to extract the two male spades I needed out of it to replace my fusible link. I installed a 16ga link and replaced the female socket in the firewall bulkhead as well.
Unfortunately I am still not charging. The ammeter needle still jumps to the right on startup, but goes back to discharge. The battery remains at 12.4V. The Haynes manual only provides a brief overview of the regulator and how it works. The 77 manual provides a detailed diagnostic section on the solid state regulator system, with electronic ignition, so I cant use the specs for my mechanical regulator system with ballast resistor. My regulator has a plastic housing.
Now I do know the alternator output wire should read battery voltage with engine off, dynamic voltage with engine on, the case needs a good ground, and the field wire should read battery voltage with key on, engine off. The regulator also requires a ground. I will check these specs and report tomorrow, but beyond that I dont know what else I should be reading at the terminals.
If I had a good diagram I might be set. Also, is there any way to "full field" the alternator to eliminate it as a problem, other than putting a load tester across the battery?