power steering details

[powerwagonpaul]

i just scored a power steering setup from a 68 camper special. got the valvebody/draglink, all the hoses and brackets and the ram for $50 (that and a decent bench seat for $100 total). not sure if i will use the ram, may try to rebuild it, or use a different one that mounts the same, hav'nt decided yet. i know some of you guys have done this. my questions are: do i use the W pitman arm, or the one from the D? who rebuilds the valvebody? what other pitfalls are there i can expect. i want to put it on my 69 W200, but i was going to mock it up on my 67 W200. are there any diferences other than the shock mounts (thats all i see) thanks all