Dave, I think the Boys truck is a 4" Superlift. Steering components are an adventure to be dealt with. May have to do a swap to crossover. The stock power assist stuff is NOT popular and his axle is a HD44 with big hubs. Probably the least common to boot.

“You never need fear a man, no matter what his size. When danger threatens, call on me, and I will equalize.”
Samuel Colt.

�Common sense is genius dressed up in work clothes.� - Ralph Waldo Emerson