Should be some archived info on this on the site. I'm assuming your 3/4 ton has brake pedals same as my 46 1/2 ton-- if so, fab bracket to fit in place of stock m/c. Find a m/c which ports on the right side (as it would be on a newer firewall install). Bolt m/c to bracket (now the ports will be on driver's side), replumb and adjust rod to your pedal. Look at some of the brake kit sites for helpful info on residual valves and proportioning valves. If you can't fab the bracket yourself, look at chassisengineering site or classicperform site. While you are doing this, it would be a good time to replace all of your brake lines and hoses.