pitman arm

Got a couple steering boxes laying around unknown condition. Was told they came from good driving trucks that were parted out. Perfect candidate for a rebuild. $250 plus shipping each.

I start my conversion of Toyota Bj42 to LJ70 power steering. The Pitman arm of LJ70 have bigger tapper hole than bj42 steering relay rod. My question is, its possible to swap pitman arm from BJ42 steering box to LJ70 Steering box and use the the steering drag link of bj42 as Rod, Steering...