STUD1Y
+1y
what you need to do is cut those cups down probably.
drop spindles.
remove the inner fenders
trim the fender lips off
get a shorter y pipe made or some custom duals made up for the truck...
and DO NOT FUCKING WELD the cross member in.
you can either make brackets to have it bolt in from the sides, or weld some studs through the frame to hold it in, and put nuts on them, or run carriage bolts.
I had the same wheels / tires on my chevy fullsize and it lays out nice on those.