Will it fit thread

I think you will fine with anything up to L60 x 15
as those are a perfect backspacing on my Demons and
Dusters and worked OK on my Swinger 340 which has
a bit small rear 1/4s. If too close buy an offset shackle
kit from Dr. diff to get a bit more space (I think about 3/4
of an inch.

My Quarters were rolled on the lip and front of quarters rolled
back a bit but stock otherwise.