I was going that route on my 79 mini. I was gonna put the D60/D70 combo from a Kaiser M715 under it. Unlocked with 5.87's but drum brakes. The main prob I ran into was the leaves being too narrow to easily mount to the front 60. The chunk was just too far over and the passenger side springpack would've had to mount up on the side of the chunk. I have no idea how a newer, nicer 60 compares though. Good luck.