So I can jump the starter and make it start on the bench.
I just tried with the starter installed with a (-) jumper cable on the starter bolts/housing, and the (+) jumper cable on the wire hookep on the starter. Hook the other ends straight to battery and the starter does NOT start.

So I must have some + wire going to ground somewhere., it's not generating enough current difference to turn the starter motor

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'83 Ford Ranger 2.3L 4Spd, Dual Tanks, 195/60R15's, Welded Rear End TOTALLED AT 483,211 MILES