I'm working on an S10 frame swap for a 50' 3100 for a friends truck. It's a Code 501 kit, while the kit is very complete the instructions are pretty vague. It's a lot more involved than I would have chosen for my own truck and you do lose a lot of the originality as well.
I would have voted for a MII front end if I was going away from the straight axel. I still need to work our the motor and trans mounts, 292 and T5 in a 95' frame with a 50' body. Lots of work ahead headscratch

~ Craig
1958 Viking 4400
"The Book of Thor"
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1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane