10bolts with that combo is bad, like rcks4me said. And even worse if you are doing mud boggin. I have a 86 CJ7 w/ SBC 350 pushing 400 ponies, 4.11s, Lok-Rights, 36x12.50 tsl, TH350, Atlas II 3.8, 10bolt front, 14 rear. (Hmmm wonder if I will get flamed for being a jeeper posting on the Chevy boards :evil: )
I fortunatly don't use the skinny pedal like my friend does at the moment due to having only a 10bolt. Really 36s are the limit for them if you wheel hard or do mud boggin. I am going to try and get a set of Warn cromoly and ctm u-joints then send them out and get cryoed. It costs like 300 or so. I have heard mixed reviews on it so this will be interesting. I have a D60 sitting around in case the cryo is bs. D60s would be the prime choice for that application. But get cro-moly, or carry around spare stock shafts. As rcks4me said the harder you wheel the more chance you will break even D60s and mud does not play well with drivetrain components.
Cheers,
Lee