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As far as the rear if its a ranger 8.8 its bolt in swap other then the flange on the dif. You will have to swap the one off your old axle or run a conversion joint. Or you can do what i did and use the drive shaft of the newer truck and mate it with you stock one.
It only bolts in after you weld on spring perches and shock brackets.
not to threadjack here but i have a 7.5 in my 87 as well and i want to swap an 8.8, anyone have a part number for the conversion u-joint? im having trouble figuring out my u-joint now and the size i need for the 8.8