Power brake m/c fittament

jeremyfx4 · Post by **jeremyfx4** » May 30, 2010, 8:06 pm

Here is what I've got fellas, my 65 has the factory power brake booster option but only has the single pot master cylinder and I just finished putting disc on the front. My question is what dual pot master cylinder will bolt to my brake booster. Should I buy a 78 or so m/c. Also if I have to do any shortening of the rods how do I get them out of the booster to do so?

slickmainer · Post by **slickmainer** » May 30, 2010, 8:57 pm

i dont know about the factory booster, all ive seen used is the 70s version

Garbz · Post by **Garbz** » May 30, 2010, 9:52 pm

Power Vacuum assist brakes were not available in 65 from the factory. It was added after purchase.

You will need to ascertain just which booster is installed IE Bendix, Airheart ect. Any boosted master from a later year will work based on bore and volume for drum drum brakes. select the year you need based on the outputs to the inside or outside.

Typical rods in the boosters are adjustable and remove by simply pulling straight out.

Garbz

jeremyfx4 · Post by **jeremyfx4** » May 30, 2010, 10:39 pm

Thanks for the info guys, if it is not factory then it looks like the ones you see in bumpside trucks, but it has the 65 type single pot mc mounted. So maybe i just need to buy a mc for the bump trucks and see how it works out. I figured the rod would just pull out but neither the one that goes from the pedal to the booster nor the one from the booster to the mc would pull all the way out, it was kind of like they had a snap ring on the other side.

ABA · Post by **ABA** » May 31, 2010, 7:53 am

Garbz wrote:
Typical rods in the boosters are adjustable and remove by simply pulling straight out.

Garbz

Mine came off a '71 and the adjustable rod is still to long at the shortest adjustment. Going to have to cut it and weld it back together I guess.
You might get lucky with yours Jeremy.

banjopicker66 · Post by **banjopicker66** » May 31, 2010, 8:06 am

Jeremy, measure the depth of the single pot master cylinder from the flat face where it mounts to the booster.
Then, take the same measurement of a '78 master cylinder (for power brakes).
If they match, you are golden.
If not, try a '73, and a '72. Make sure you specify with disc brakes of course.
Good luck!

cdherman · Post by **cdherman** » June 1, 2010, 10:14 pm

Garbz wrote:Power Vacuum assist brakes were not available in 65 from the factory. It was added after purchase.

You will need to ascertain just which booster is installed IE Bendix, Airheart ect. Any boosted master from a later year will work based on bore and volume for drum drum brakes. select the year you need based on the outputs to the inside or outside.

Typical rods in the boosters are adjustable and remove by simply pulling straight out.

Garbz

If that's true, then why did FoMoCo put the whole section in my shop manual about power brakes?

I mean, if it was a dealer added option and as variable as you describe, then I cannot figure why Ford went to the trouble of writing it up in the shop manual. The pics show that funny looking booster that looks totally differnt from later 70's era units.

I think Ford did send some out with power brakes, or at least there was a pretty standard option that they recomended for F100 trucks........

fmartin_gila · Post by **fmartin_gila** » June 2, 2010, 7:43 am

Like BJ says, the recess where the rod fits in the piston is quite a bit deeper in the single pot than the dual pot. About 7/8 or an inch diff.

Fred

Breezeman · Post by **Breezeman** » June 2, 2010, 10:03 am

I don't know if this will works on a power booster but I bought a dual MC for a late 60's mustang and it bolted right up with correct push rod length.
I DON'T have the power booster. I got info from this website about 4 or 5 years ago. I read where others have done that so I tried it. I have PS box, front discs and the proportioning valve from a 76 F100.
Maybe you can give this a try.

PS. Anyone know what it would take to add Power Booster?

Later
Keep'em slick !
Larry

Shawn F. · Post by **Shawn F.** » June 5, 2010, 5:50 pm

I once had a power booster and M/C for my 66 F100 with disc brakes and prop valve on it. I never installed it fully because I sold my drop beams and the booster and M/C to a member on here thinking I was going to buy an aftermarket IFS unit and never did. I will say that the rod was too long and needed to be cut some and rethreaded or re welded (I recommend rethreading so there are no joints to worry about breaking.
I want to say my unit was from a 73 or so F100 but cannot say for certain. I am in need of the info on this very same question on what year booster and Master cylinder I need so I can add it to my 66 F100. I still plan to get a Dakota front end but that will not be anytime soon so for now the power steering and late model brakes will work.

jeremyfx4 · Post by **jeremyfx4** » June 6, 2010, 6:52 pm

Here is my brake/mc setup that was on my truck, maybe some of you guys can tell whether it is original or not. I think i'm just going to take out the power brakes and go with the manual m/c off of something else, i'm going to try one off of a 79 f100 w/manual brakes and w/front disc.

TxSlick66 · Post by **TxSlick66** » June 10, 2010, 6:29 pm

Master cylinder will either have 1/2" or 1.0" pushrod depth as measured from the mounting flange to the bottom of the piston. Just match the one you have.