Here are all the different drivehafts they came with in 1988.
Regular Cab, 7' box (114" WB), 4x4, MT, ID E57A
Regular Cab, 7' box (114" WB), 4x4, MT, ID E67A
Regular Cab, 6' box (108" WB), 4x2, AT
Regular Cab, 6' box (108" WB), 4x4, AT
Regular Cab, 7' box (114" WB), 4x2, AT
Super Cab (125" WB), 4x2, AT (assembly)
Super Cab (125" WB), 4x4, AT
Super Cab (125" WB), 4x4, MT (assembly)
Regular Cab, 6' box (108" WB), 4x4, MT
Regular Cab, 7' box (114" WB), 4x4, AT
Regular Cab, 6' box (108" WB), 4x2, MT, 2.0L
Regular Cab, 6' box (108" WB), 4x2, MT, 2.3L, from 4/88
Regular Cab, 6' box (108" WB), 4x2, MT, 2.3L, thru 3/88
Regular Cab, 6' box (108" WB), 4x2, MT, 2.9L
Regular Cab, 7' box (114" WB), 4x2, MT, 2.3L
Regular Cab, 7' box (114" WB), 4x2, MT, 2.9L
Super Cab (125" WB), 4x2, MT
You didn't say what engine you have, and what the wheelbase is