Hi guys, new to the forum. I have a 1969 F250 and would like to convert the front drum brakes to discs. When looking on LMC site it only offers the conversion for F 100. Are they compatable? The sad part is that I'll have to go from an 8 lug to a 5.

 

I bought my conversion kit from Summit Racing, not sure if they have the 8 lug kit
Another option could be a donor truck for the spindles and then the rotors and calipers should be available from Napa or or other parts stores
Good luck and welcome to the site

 

Hi! I did this swap and wrote up a ""guide""


If you want to keep the 8 lug you can use OEM parts from the later trucks. The off the shelf conversions for the f100s *can* work but then you're 5 lug.

One possible option that I"ve not been able to test is to use the LMC kit (which is a resold CPP 6572SWBK-12 kit). This uses spindles that match the 74 F250 "light duty" single piston spindles. Part numbers and bearing sizes:

* A12 - '74 F250 Front Outer; RWD; with Light Duty Brakes & '74 F250 or '74 F100 6.4L, ID 0.875", OD 1.75"
* A13 - '74 F250 Front Inner; RWD; with Light Duty Brakes & '74 F250 6.4, ID 1.378", 2.134"
* MOOG 8524N - Ford F100/F250 2WD '66 - '74, (0.8592 x 6.353 Inch Pin, Nylon) https://www.moog-suspension-parts.com/moog-8524n

What this means is there's a possibility of using the 74 single-piston rotors (CENTRIC 12165000), with the LMC/CPP spindle brake kit, to keep 8 lug on your truck.

Unknowns: the F250 8 lug single piston rotor is possibly 1/2" larger than the one in the kit (12.58"), and possibly thicker too. Its unclear what rotor is included as they list it as a 12" rotor but the stock F100 5 lug rotor is 11.72" diameter (CENTRIC 12165001). Thickness is 1.24" for the 8 lug single piston vs 1" for the OEM F100 5 lug, but again it is not clear what rotor they use in the kit.

This means the caliper may need a custom bracket to space it a little out from the spindle, or that the 8 lug rotor is too thick to fit in the caliper. If you contact CPP and ask for measurements of the rotor they use, as well as possible off the shelf replacement parts, it could shed some light on this. Also since its unknown what rotor they use, its possible the in/out alignment of the caliper to rotor is wrong and would need to be spaced or otherwise.

More options, https://classicdiscbrakes.com/1948-73-Ford-Truck-Complete-Front-Disc-Booster-Combo-648648.htm seems to indicate an F250 option, but they don't have info on if that's 8 lug. I would assume so, but they also charge a premium. If you get info update this thread for future people

 

Dual piston caliper front disc brakes were an option for 1968/72 F250 2WD & F350

 

I too have a 69 F250 2WD and I am looking to convert the from drum to Disc brakes.

Question :: Will a 1974 F350 2WD donor truck work ?

 

You'd be better off with a 1973/79 F250 but there are two different types of disc brakes.

Some have single piston calipers. some have dual piston calipers and this is what you want.

 

Thanks!! Been looking for the 73-79 F250 donor without any luck—

Will the F350 2WD front disc brake system work? I found one for a good price…

I understand there is a single and dual piston version

 

All F350's have dual piston caliper front disc brakes, F250's could have either.

If you have an F250, I would look for one. F350 parts may work, may not work.

All 1953/78 F350's are 2WD, 1979 was the first year that F350's were available with factory installed 4WD

 

The F350 stuff is the same and actually what I used as it was easier to make sure that it was dual piston.

The calipers are the fairly easy part, and you can even just buy them new. The hard part is the caliper brackets and matching your spindle. If you have a '69 with the heavy duty 2.5" drums, the caliper brackets will bolt straight to your spindles in the same 4 holes the drums did. Then just the '69 rotor to fit the 76+ dual piston and you're golden. Part numbers and donors are in my post, grab all the hardware from the donor truck too as it's a bit annoying to find.

 

The F350 parts are not all the same as F250. Yesterday on t'other site, a fellow was looking for rotors for his 1973 F350 with SRW

He lives in Europe and had bought rotors from a well known online auto parts store, who told him the rotors were the same 1973/79 F350 with SRW

I knew this was BS because I've looked these rotors up in the 1973/79 Ford truck parts catalog many times before. So, I typed this:

D3TZ-1102-C .. Hub & Rotor Assy. / Use with Single Rear Wheels / Obsolete

1973/74 F350, 1975 F350 before serial number V80,001 / The hub/rotor used on 1975 F350 from serial number V80,001 will not work.

The 1976/79 F350 hub/rotor will not work, either. This hub/rotor has been obsolete for over 30 years. I've been looking for some for over 15 years.

No Ford dealer or obsolete parts vendor has any. Try ebay using this Ford part number.

 

Sorry, in this case I was specifically talking about that the F350 Dual Piston Calipers and Brackets are exactly the same/will bolt to the F250 stuff. In fact, its the best way to look for them as the F350 never came with the single piston where the caliper bracket is cast into the spindle. The Rotors are not the same as the spindle/bearing is larger on the F350, so you use the F250 rotor.

I know this, because these are the exact parts that I bought and used.

 

I know that the dual piston caliper brackets are very hard to find.

 

Yeah, its basically the key part in the 'easy' brake swap. But if you search car-part by a '79 F350, then you only get the interchange you need (their system is really nice for this). In fact, there's a yard selling a pair of them right now:



Just gotta make sure its the 2 bolt 2WD and not the wide 5 bolt 4WD bracket.