I didn't see anything in the maintenance section (maybe I missed it) but I'm going to be doing some work on my Dana 70 in a couple weeks and I'm trying to figure some things out. I'm adding a detroit locker, HD diff cover, and a 1410 u-joint pinion yoke. My questions are: when replacing the pinion yoke, am I going to need a crush sleeve or washers? Does anybody know the preload spec? And does the '67 Dana 70 need a special pinion seal or can it use a regular seal for a newer Dana 70? thanks for the help!