phat set up isn't aftermarket. That was the hydraulic ast. steering that was installed on most of the high boy up to 1977 1/2. The funny looking arm between the pitman to the knuckle is a valve. When there is enough force to over come the spring in that link it shuttles fluid to a cylinder installed where a stabilizer would normaly be. The four hoses you see coming from this valve has two going to the cylinder and two to the power steering pump. I don't know how this system worked when they was new but I do know it's exspensive to replace all the parts to make this system like new. I have never seen a aftermarket kit to replace this system but I have changed one over to a normal system. If you search this topic on the web you will find a few people out there that show how they changed thiers over. I looked at thier pictures they showed and came up with my own idea. I used a power steering box from a 1995 E250 van. I think this is a common gear box used on alot of the 250 and 350 trucks and vans. I made a bracket out of 1/2 inch plate that I could bolt the new gear box up to and have the pitman control shaft come out through the frame like the old one. I did have to cut the hole in the frame bigger, but after I welded a cover plate over the face of the frame it looks factory. I had two new hoses made using the fittings off the old lines. I also installed a new stablizer where the hyraulic cylinder set. With a few changes to the column shaft I was done. I have also seen one done with a set up from a newer dodger pickup but it set out side the frame and the pitman arm and column shaft set ups looked kinda funny. If you have no luck coming up with a idea email me and I will send you some pictures.
