I have a 63 amp 10SI alternator installed and I am happy with it. This is a three wire alternator. The sense wire runs to the accessory side of the ignition switch. If you run it to the ignition, the engine will not shut off. Plenty of posts on this forum on how to do it.

e.g.
10SI alternator

To install, I swapped the generator bracket end to end and drilled a new hole to match the mounting points on the block. This made the alternator pulley line up with the water pump pulley.

Gord 🇨🇦
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1954 1/2 ton 235 4 speed