My hope/plan is to do away with the rockers and the support box structure under the seat and replace it with heavier steel that will double as a slider. I'll also be tying it into the frame with bushing mounts.

I got my Doubler piece from Jeds last week. Now I've got to get my NP205 case machined for the larger 90mm/32-spline input and I'll be ready to start bolting stuff together. I'm looking for a NP203/TH400 32 spline input gear if anyone has one also.
I'm going to re-use the front hangers for my 52" springs. Does anyone see a problem with welding those hanger pieces together for added strength or am I over-killing?
How much did that adapter run you?
I would weld it to the body mount just for fun, then bolt it to the frame of course.
Weld the snot out of them. My truck is a '79 so our frame rails are the same and when you move the spring mount portion forward things will not bolt up at the front.
I cut them up a little bit, welded in some steel plate and drill some holes, the pieces are held together with bolts also.
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I just bought B-52's and took the easy way out.
I sold my 2001 Jeep for a few grand so I figured I might as well buy the good stuff.I've considered doing the same, they're pretty nice.