68-79 Disc brake swap problems..
Thread Starter
|
Junior User
Joined: Sep 2009
Posts: 55
Likes: 0
68-79 Disc brake swap problems..
I have a 68 Manual drum and I am going to power disc from a 79. I got the I beams swapped ok but I seem to have a problem with the booster/master cylinder. I was told a 72-76 combo would work so I got a new 74 combo. it looks like to make it work I would have to drill new holes in the fire wall and also the new master cylinder/ booster combo rod is shorter compared to my stock 68 non power master cylinder rod..Is there anything that would bolt up directly without cutting???
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
You didn't use everything, because it fits. There is a difference in the length of the arm inside the cab. You have two choices, drill a second hole about 1 1/8" down the shaft (what I did) or add spacers to the firewall (that had been reported and I have not seen). The fire wall layout is the same from 65 to 79, the correct parts will fit and work.
John
John
Thread Starter
|
Junior User
Joined: Sep 2009
Posts: 55
Likes: 0
Thanks for the replies..
Oh yea, Lying in bed last night I remembered the bracket...DAHH
Ok, so really my only problem the lenght of the rod...the Stock master
cylinder Rod is longer..What to do ?????? Re-drill the brake pedal????
Can I replace the ROD in the booster ?????
Oh yea, Lying in bed last night I remembered the bracket...DAHH
Ok, so really my only problem the lenght of the rod...the Stock master
cylinder Rod is longer..What to do ?????? Re-drill the brake pedal????
Can I replace the ROD in the booster ?????
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
The in cab blade will need to have the hole relocated.
If the rod on the firewall side is too long where it connects to the MC it is screw in adjustable.
You do need to be using proper power brake parts.
John
If the rod on the firewall side is too long where it connects to the MC it is screw in adjustable.
You do need to be using proper power brake parts.
John
Senior User
Joined: Jun 2009
Posts: 213
Likes: 0
From: anderson sc
Here's what I did on my 68 and went with a 79 set up. worked for me, Im sending Pictures. you can see I used the 79 braket behind new booster. The rod was to short, so I removed pedal and made a bracket. You will see the black bolt I bolted new bracket to pedal, I also welded it as will. May be hard to see, I use white grease hooking up brake rod. Spacer,s sounds like that may be better. My problem I had was the brakes were way to touchy I remove vacum hose from intake, to back side if carb. work,s perfect. Oh also pedal was a tad to high when I install new brake switch was able to make that ajustment. How ever you deside to go with this. good luck.
Senior User
Joined: Jun 2009
Posts: 213
Likes: 0
From: anderson sc
Trending Topics
Senior User
Joined: Jun 2009
Posts: 213
Likes: 0
From: anderson sc
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread Starter
|
Junior User
Joined: Sep 2009
Posts: 55
Likes: 0
I may need to run the vacuum from my carb also....Only port I see is going to the trans. Well, I figure I must have not pulled the booster bracket and left it on the core I turned in..Damn I'm dumb...So I need to know what year of booster bracket will work..Truck is a 68 and the booster is a 74 Disc/Drum booster...Anyone know what year of braket I need??? early 70's look different than later 70's???? Also, anyone have one?? This is the last piece I need to get it all put back together...Please help......
Senior User
Joined: Jun 2009
Posts: 213
Likes: 0
From: anderson sc
You do know the booster bracket is not one unit it is two separate brackets could be laying around on top of each other flat. When I did my brakes thought it all was to bolt on easy. But I too found mounting booster to pedel did not match up. My brake swap was from a 78 truck. There's a lot of members here do know a lot more about this. May have to make your own bracket's/ spacers's ? The 78 booster bracket made the booster 1 1/4 to far out from wall. Also the bolt holes on fire wall and the bolts on booster are differant width's the bracket was bent on an angle. Hope this help's.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
I may need to run the vacuum from my carb also....Only port I see is going to the trans. Well, I figure I must have not pulled the booster bracket and left it on the core I turned in..Damn I'm dumb...So I need to know what year of booster bracket will work..Truck is a 68 and the booster is a 74 Disc/Drum booster...Anyone know what year of braket I need??? early 70's look different than later 70's???? Also, anyone have one?? This is the last piece I need to get it all put back together...Please help......
The firewalls are basically the same from 65-79, that is why we can swap the system in, just grab a bracket from a junk yard off another truck.
Number dummy may show different part numbers, but they are close enough there doesn't seem to be any problems.
John