I have a 70, the kits being confusing is a matter of the different boxes create different mods necessary & each one has it's own personal solutions to various clearance issues, example - the saginaw conversion are different box mounting position and pitman arm used depending on SOA or SUA, what arms your using, drag link over spring, etc....You can use the saginaw, a mini box, fj60, 4 runner,thats personal choice, I like the saginaw, it requires minor frame mods where box mounts and some column work in the engine bay and adding the pump to the 350 is easy, a finned billet cooler, steering effort is easy, pitman arms for whatever rod ends you are using will be easy to find and the boxes are like $150 ish at parts houses. Search for a 76 Jeep J10 pickup or a J20 (starts in 77 I think) , there are 2 boxes for these applications, both work(identical) except the J20 one has a larger piston.Both are 4 turn, 13/16 input IIRC.
The saginaw you will need : a box, a frame plate, a pressure line & a return line, an engine bracket( pick N pull) and belt, order the P pump 4501 or 4105 , can't recall, from PSC with pulley you need and that pump has different resiviors you can use a remote or get it with a ham can style. You'll need to buy some borgesen U-joints , slip shaft, and fab up the column, you'll need 1 bearing to put in the end of the column tube in the engine bay. You will need a welder to fab the new slip shaft into the column, u-joints, and mounting the box plate. Minor cutting is needed on the front cross member to get box into proper location. There are scab plates sold that you weld back in to strengthen the cut area of the crossmember. Yes the steering shaft will rub or almost rub the inner edge of frame right behind the shock tower(just a bit forward of it but you get the picture). Once the column and box plate are done mount box, run hoses.
You will need a pitman arm with a taper end that matches whatever drag link end you run, won't know if it will be a straight arm or bent until you have it all mocked up.
You will most likely need a new drag link, and set your steering stops so it does not use the box as the stop.
Search the sgainaw conversions to see the different mount positions. If you are SOA the tilt of the box makes a difference on the end of pitman hitting the spring pack at full left turn, a horizontal mount position is better for SUA and the amount the box is pushed into the front cross member effectd the drag link clearances so thats why the box position is important, its not a huge difference in position but the tilt and amount pushed back can solve minor issues or create them.
