Anti-Lock Brake Conversion?

You don't need nor want ABS. What you WANT is to balance the system so that it stops correctly. The main ingredients are the operating condition of your brake system, whatever changes (conversions) you have done with regard to brake type, size, wheel cylinder size or caliper size and type, AND THE TYPE of brake lining, and the wheels and tires size.

Install an adjustable proportioning valve.

I have just put together a 99 Dakota that I bought "non running" which has 4W ABS. Turns out you need an expensive scan tool (not the dimestore code reader) which programs the module in the truck to "diddle" the solenoids and drive the air out of them.

THAT SYSTEM is coming OUT!!!