How many props are there and what are the differences?
Mines a 1985 N/A Diesel but I've fitted a disk axle but so far kept my 10 spline diff. Had a vibration (seems to peak at 35 to 40 then goes off a bit) after fitting it along with new std height yellow springs (that seem a few inches higher than the old rusty ones) and procomp shox, I found a worn u/j and replaced it as well as replacing the lower arm to chassis bushes and now its worse :( It was perfect before I changed the axle (case went porous)
I don't think there's too many differences, the axle case must be from a newer one and I replaced the lower axle arms, the only thing was the replacement arms were thinner than the old ones on the drum axle.
-- Jon