if you get a 5 speed from an 83 or earlier(you want the 83 L52 tranny, the other one was junk) it's a direct bolt in for the most part. you'll have to grind down the splines on the t-case, since instead of having a relief area on later cases, the 4 speeds had raised splines past where they really matter
if you get a later tranny, you'll have to get new driveshafts made(or find a suitable donor), and relocate your t-case crossmember.
i want to go the l52 route eventually, i'm not a big fan of 4 speeds but i always seem to end up with them(last 3 trucks were)
