Fib: Here is your info,

I call THIS the Saginaw option. (CPP 500 series)

I call THIS the Toyota option. It is supposedly a "CPP design" clone. Actual Toyota boxes become very hard to find. This clone is better and has a better ratio. (CPP 400 series).

The hardest part of DIY is the pitman arm. Next, be sure drag link is level. The rest is straight forward for an engineer. Hook things up and plumb it. Maintain geometry. I've seen many DIY hybrid welded pitman arms. 1/2 fits truck, 1/2 fits donor box. They are forged so the weld will be good.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn