Thanks, that's what I needed to know.

Next question. Will the rear end bolt up direct to my drive shaft?

Also, I've always heard that with 4x4, the gears have to be the same. The front is 3.73 and the donor is 3.55. Keeping in mind that I'm tight on budget, how cheaply could I get the 3.73 gears. How would I be able to find them in a JY?

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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