Maximum Motorsports maks a decent manual brake conversion kit. I used a old SVO master cyl. It is a 1 1/8 " bore, supposed to be about the biggest. some Linchon cast iron units are the same. I used M/M perportioning valve delete kit and a manual valve for the rear bias, that replaced the spacer in the hardline on the pass side by the hood hinge.

There are an assload of options, Decide on what wheels and what you are using it for and that will decide your brake options.

Good luck and keep it safe!