Getting ready to put some TMR arms on a SuperDuty 60 so looking for a little insight. Wish mine were that Easy I have to put a step in mine and drill/tap 5 bolts.
Just a suggestion. Add the HS arm to the passenger side knuckle only. At the cast in arm on the knuckles open up to a common taper, 5/8 or 3/4 straight bore. This will preserve Ackerman steering geometry.
