going with c-body axles will give you the large brake offset at the flange end

so if you have the 1 3/4" brakes you will need to use the c-body backing plates and drums

some of the 4x4 truck 8 3/4 have the 5 on 5.5 wbp also

the axle needs to be at least 29" before the end tappers down to be a canidate for cut/respline

not all truck and c-body axle are canidates for this

DR Diff or moser

are you running green bearings?