As far as the rear axle, what will straight swap for mine and bolt up to my drive shaft? Other than an 89-92 ranger, I don't know what else I can look for.

I really wish there were a search program that you could just put in "1989 ford ranger driver door" and it would list everything that had the same door.

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1989 Ford Ranger XLT Extended Cab 4x4
2.9L V6
d28 front, 7.5" rear with 3.73 gears
Mitsubishi FM146 manual transmission
31x10.5 15 tires