Yes, + side of coil goes to the switch so both are electrically the same.
I just recently converted my UB to Delco 3 wire alternator. I wired mine as follows:
#2 wire on alternator plug to large post on back of alternator, then from this post to both the Bat and L (load) wires from generator regulator
#1 wire on plug through a diode to the Positive + side of coil. (band end of diode toward alternator).
For Delco alternator, tractor must be negative ground and Negative – side of coil goes to distributor.
Mine has original pulley on alternator, uses same belt as generator and it starts and charges at low RPM. All automatic, no extra switches to worry about.
My email is open if you have questions or would like pictures
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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