Was Hydroboost an option?
#1
#3
Some good reading in this thread from another forum: Brake hydroBoost Upgrade walk throught - Ford Bronco Forum
#4
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#5
Some good reading in this thread from another forum: Brake hydroBoost Upgrade walk throught - Ford Bronco Forum
Also a few thoughts from me since I've done the swap on my F-150:
If you buy a reman hydraulic unit it does NOT come with the pushrod, spring, or retainer that go between the booster and the master cylinder. You'll have to either buy aftermarket from the likes of Talon Hydraulics or find used ones from an F-Super Duty truck. I wasn't fixin' to pay the prices that Talon was asking and I couldn't find an F-SD truck with hydroboost in my local yard so I made up my own pushrod out of two shorter ones by welding them together and cutting to the appropriate length. Reason I didn't just use round bar stock to make one from scratch was that it has a groove machined in one end to grab the retainer. Since I don't have a lathe I wasn't gonna try to make that groove by hand in raw stock!
If your pump is at all worn out and whiney, it will whine constantly after you add the hydroboost. Mine sounds like a supercharger now. Lol. I've put a seal kit in it but that never did solve the whine.
I am not sure about the 3/4 ton+ trucks but the F-150 master cylinder does NOT fit the hydrobooster in stock form. I had to slot out the mounting holes to get it to fit onto the booster studs. I would not recommend using a F-SD MC because that truck will have disc brakes all around and it's MC will be set up for rear discs. Trying to get it to work with dumb-dumb drums would probably become a headache.
You will have to either slot the firewall mounting holes or buy the correct hydroboost-compatible brake pedal assembly to get the pedal pushrod to travel in a straight line.
#7
Just source the pushrod, retainer, and spring from a j/y.
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