That tech is out there, but as C9x says, it's rather "esoteric", and very out dated. Classic Performance Parts sells a dropped axle that is newly manufactured, and there are "mono-leaf" springs available to lower a leaf sprung front or rear. Caster wedges are available, as well as other parts. The tech is very rudimentary, and quite straight forward; the angles and all are in any old Chilton's, or Motor's, or older and repro shop manuals.

However, unless you are just set on doing a front end job in the old fashioned way, I would ask: "WHY??"

I have a '59 Chevy pickup with the stock leaf front suspension, and have examined the ins and outs of lowering, converting to disc brakes, power steering, and retaining the solid axle; it would involve almost as much work, and cost as much as, or more, than stripping the old axle and suspension off, boxing the frame, and installing a new Mustang II or other newly manufactured independent front suspension, and would not handle as well, or ride anywhere near as well as the indpendent suspension. I have turned this over and over for several years, now, and have decided to come into the 21st century - and I am really a luddite - I like old stuff. But this is one place I'm going to opt for new and modern; it won't cost any more, and will be a definite improvement.

Questions?? Ask away. And as was said earlier, check out H.A.M.B., or Rodders Round Table, too. Most of us don't bite, and we only growl once in a while.