Or just find a 4.11 unit from a '67-'72 at your friendly boneyard. I paid all of $66 for mine, and it seems to be fine. As of yet it isn't installed, but I am going to pull it apart and check everything before it goes in the truck. They aren't particularly common, but they do show up from time to time.
Now if anyone has one of those in positraction, feel free to send it my way!
