disc brake upgrade
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Senior User
Joined: Jun 2011
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From: Deltona Fl
disc brake upgrade
another disc brake question - found a 77 parts trucks and it has disc brakes but not power disc brakes just has a master cylinder would this set up be ok on a 68 ?
Fleet Owner
Joined: Dec 2009
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From: NorCal
There are also slight differences in the location of the hardlines where the mount to the frame at the hoses.
You also need to use the later (D2TA stamping) pitman arm and steering linkages because the geometry will change slightly by using the 77 spindles, radius arms, and I-beams.
EDIT: I am also going power brakes using the MC and booster from a 75 2WD with OEM discs.... the donor had its right front wheel stuffed back to the firewall. It weren't pretty.
Posting Guru
Joined: May 2010
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From: Alton, MO
You can use everything from the donor you just won't have power but you can add that later if desired. You will have to change the master when you put the power booster on. If the pric is right I would do the swap all the while shopping for a power booster and master.
Fleet Owner
Joined: Dec 2009
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From: NorCal
However, a set of well adjusted drums can perform well... in the dry. The reason I don't like front drums is after a while they pull to one side or the other, are really susceptible to fade, don't work very well in the wet, and require periodic adjustment and cleaning.
Discs? Set it pretty much forget it. They're self adjusting and wet rotors can be dried with a light ride of the whoa pedal. Simple, proven, and fewer moving parts.
You can use everything from the donor....
Lastly, you'll also need the bracket btwn the booster and firewall cuz the booster is mounted higher up on the firewall..
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Posting Guru
Joined: May 2010
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From: Alton, MO
Technically he doesn't need to change his master if doing manual discs. As many people that do this swap I am kinda shocked a member here or somebody hasn't started fabbing up booster mounts. Hint, hint. Realistically there can't be that many variations. I would think slotting the mounting points would allow for vertical adjustment making it usable for many applications.
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Cargo Master
Joined: Dec 2006
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From: hinckley ohio
I did a 77 disc brake set up and a 79 mastercylinder bracket m/c and booster for the brake pedel I found one out of a 77 that was power brakes.The 79 pedel has the hole to mount it to the brake booster in a different spot and made the pedal close to the floor.You can use your original brake pedal it will be high off the floor I believe. I had a 72 power brake pedel in mine and it was high off the floor probably could redrill a hole to make it better.
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