Power booster mounting problems!

[TommyShameless1978]

Okay guys, I am a bit clueless right now. My 68 Runner WAS a 4 wheel MANUAL drum car. I want power brakes because, well, because that's just what I'm used to. I just got a remanufactured unit from Cardone (booster / master cylinder assembly). It is the one Rock Auto sells specifically for a 68 Satellite with 4 wheel POWER drums.

I just got in from the garage, bolting the unit on. It bolts directly to the firewall, but the push rod is too short and sits too high to hook up to the pedal. I'm obviously missing something, but I don't know what. Wrong pedal? Wrong pedal mount? Who here has the part I need, how much do you want for it, and how fast can you ship it to Southwest Florida?

I mounted it without the steel backing plate that the manual master was bolted too, but I can see that I should probably enlarge the opening on that piece and use it with the power booster. Of course, that does nothing to solve my current issue!

Thanks!

Tommy

 

[5.7 hemi]

There are 3 holes on each side of the big hole that the rod goes thru to the pedal, lower the booster to the next set of hole and see if that helps. That should line you up with the hole in the pedal.

 

[TommyShameless1978]

No, that won't work here. The bolts on the booster are far enough apart that they go into the top and bottom holes on each side...the middle hole on each side isn't even being used.

 

[TommyShameless1978]

Okay, here are a bunch of pics. You can see that it fits great, and looks like it totally belongs there, but under the dash is a while different story! There is something fundamentally wrong here, but I don't know what. So if anyone has the part I need to make this happen, I am all ears!

Tommy

 

[q-ship]

There is an extra linkage peice and related hardware for power brakes. Here are some pics of a power brake pedal with the linkage attached.

Sorry for the fuzzy pics as I used my phone, but it shows you what is needed.

 

[warwagons2]

Also you will (must)need to use the firewall backing plate. They are different than the manual but you may be able to modify the exsisting one. Do not mount the booster without it.

 

[q-ship]

Also you will (must)need to use the firewall backing plate. They are different than the manual but you may be able to modify the exsisting one. Do not mount the booster without it.

Correct. The backing plate is for firewall reinforcement, otherwise the firewall will flex under braking.

The plates are near identical and easy to mod if you can't find the right one.

All that is necessary is to remove the top studs from the manual plate, and extend the center cut out, but the power backing plates are common as most everyone switches to manual disks at some time, so I would keep the manual one stock as I'm certain that you will be upgrading the brakes in the very near future.

 

[TommyShameless1978]

Aha!!! Q-ship, as usual you are the man with the answers!! Is that linkage setup for sale? Do you have another one? Do you have all the parts I am missing?

Does anyone?

Tommy

 

[TommyShameless1978]

Sweet! Found it on Ebay. Paid way to frickin' much for it, but it's on the way!

Tommy

 

[watermelon]

Sweet! Found it on Ebay. Paid way to frickin' much for it, but it's on the way!

Tommy

just curious. were you able to finish this project off?

if so, I would like to know what your final parts list was to accomplish the upgrade.
i have a 66 Coronet that has 4-wheel manual drum brakes and a single reservoir master
cylinder.

i have ordered a set of Wilwood Dynalite Pro front discs and would like to get a new
master cylinder with a power booster.

i see summit racing has a "summit master cylinder/power booster" kit when I search by my
make and model. i may purchase it.

also, i think i'll need to do some brakeline plumbing as i only have one hardline running
from my single-reservoir master cylinder to a splitter block of some type in the engine
bay area.

every picture of a dual-reservoir master cylinder i have seen has two hardlines leaving it. where do the two lines run? is one line reserved for the front and the other the rear?

also, where do you pull a vacuum source from for the booster? did you use a vacuum gauge to check the vacuum? the summit kit i am looking at getting says it requires 18 inches of vacuum. i don't what's going on vacuum-wise within my 440.


thanks,

watermelon

 

[TommyShameless1978]

Hey Watermelon!

As far as your vacuum source goes, use either the big *** hole in the manifold behind the carb (it probably has a plug in it now), or if you have a Holley, there should be a huge vacuum port in the base plate.

If you have any sort of noticeable cam in that 440, good luck making enough vacuum

As for your booster mounting, I am unfamiliar with the Summit kit, so I don't know what would be involved to make it fit. I used a brand new one specifically for a 68 B body with 4 wheel power drum. I got it from Rock Auto, and it was made by Cardone. I did this so I could get this all back together using factory pieces and not have to modify anything or make something from scratch. It was also the cheapest way to go, short of pirating everything off of another car!

Tommy