I used a minitruck DC driveshaft for my SOA rig, in the rear. Works great. Not positive of the year, but I think it's mid 80's. One thing to note, and I just went through this, but the slip joint orientation is opposite of the 40 series with it closer to the diff, to utilize the DC joint at the t-case. I just recently had it retubed with .120 DOM, since it spun on a trailride a few weeks ago.