I'd say that a Stock Wagoneer axle is good for 33's with no worry of breakage. ChromO's help it out a BUNCH!! I'd say that a D44 with Chromoly axles would be safe up to 38's. I run mine with 36's.

The way I did my SAS was different than most do. I sorta built the lift into the truck when I did it. I also used alot of stock suspension parts off the shelf from diff. manufacturers. The spring mounts front and rear were taken off of 70's dodge truck frames. The Shock towers are F250 Mounts from the dealer that are welded directly to the frame rail. The Leafs are lift springs from a wrangler. Shocks came off the back of a New dodge truck(I think)

If anyone has any specific questions about my SAS, setting up diff's, caster angle, setting up gears...etc.. , I'd be more than happy to answer them.