I haven't seen one done yet,but I'm researching an electrically-assisted,( '80's I.H.C. set-up),dual-reservoir brake system. I used to drive a couple of straight trucks,equipped with electric assist,and I like the system. This is a firewall-mounted unit,as well.The I.H.C.'s were drum all the way around. The hydrovac has nothing to do with your 2-speed.They both use the same "vacuum manifold",but the plumbing branches off from there. One line to the hydrovac,and one to the 2-speed shifter,(not sure where your unit is located).My unit is bolted to the transmission.There are 5 lines ,on the shifter. one from engine to unit,two,from the shifter,to the vac. diaphragm,the small line connects to the 2-speed adapter for the speedo,and one for atmosphere,(vent behind the seat,driver's side,exit). If I change my brakes,i'll keep my vac. unit,because it works well. What kind of isssues are you having?
Last edited by wetwilly5757; 05/01/2014 5:31 AM.