Front Disc Brake Conversion Small Bolt Pattern

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I'm pretty sure Wilwood also makes a front brake kit that has either SBP or BBP. It uses the 10" drum spindles also. To me, the down side to those is the replacement pads have to come from Wilwood if I remember right.
 
Shorty1029 said:
Any idea on which master cylinder bore size I would need? It gives 2 options... 15/16" or 1 1/32"
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if you have manual brakes...


Edited... I had it backwards


15/16 will take slightly less leg force to stop, but slightly more leg travel.
1 1/32 will take slightly more leg force to stop, but slightly less leg travel.

with power both will be about the same
 
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glenn340 said:
Why not do what the factory did? A little more work sourcing the parts over buying a complete kit.
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benefit of this route is you go to the parts store and say 71 dart front disk and you get the right parts. ALL other options you have to know the particular parts that came with a kit and their nuances
 
Mike69cuda said:
I don’t understand why folks think converting to the big bolt pattern is so desirable. By the time you do front and back conversions, you have spent way more than you would have buying expensive small bolt pattern wheels like cragars, or having some custom made.

I understand there may be other reasons why folks do it, but spending the time and money to do it just to move away from SBP seems like a waste to me. Just my opinion…..
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I'm in 100% agreement. "For me" there are enough wheel choices, because I like factory or day 2 stuff. There are still plenty of deals around on aluminum slots, for instance and they are perfect for the time period. I'm leaning more toward stock steel wheels and wheel covers if I can make it happen.
 
Dana67Dart said:
if you have manual brakes...

15/16 will take slightly more leg force to stop, but slightly less leg travel.
1 1/32 will take slightly less leg force to stop, but slightly more leg travel.

with power both will be about the same although 15/16 might be more touchy till you get used to it.
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But how much "leg force" are we really talking about to stop a 2750 pound early A body, for instance? lol
 
original SSBC went belly-up in 2019. Bought by an equity Corp and renamed SSBC USA.
I don't know if the new company offers the same kit as the old one.
 
Darter6 said:
Stainless Steel Brake Corp (SSBC) disc brake conversion kit came with rotors that were drilled for both 4 1/2'' and 4''.
They use the 10'' A body brake spindles. If memory serves they fit 14'' wheels.
Not saying that they still do but may be worth looking into. Just a thought.
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Yep, this kit is still available. Uses 10 inch DRUM brake spindles. Drilled for 4 inch and 4.5 inch so you can change them any time. When the new company started selling, I bought an extra set of the 4 pot calipers (very close to the original KH set up) and the integrated drum/hubs for both sides for whem my 20 year old SSBC brakes need.
rebuilding.

I use them with my factory 14 inch ralleye wheels - no muss no fuss.
 
RustyRatRod said:
But how much "leg force" are we really talking about to stop a 2750 pound early A body, for instance? lol
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just more!

some guys are:

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don't hate me because I'm politically incorrect!
 
Dana67Dart said:
if you have manual brakes...

15/16 will take slightly more leg force to stop, but slightly less leg travel.
1 1/32 will take slightly less leg force to stop, but slightly more leg travel.

with power both will be about the same although 15/16 might be more touchy till you get used to it.
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Dana. That's backwards.
15/16 less leg effort, minimally more travel.
1 1/32 more effort, less travel.
Cheers
 
I too used SSBC (installed about 20 years) on my '71 Dart GT. My car has the factory installed 741 case 3.55:1 sure-grip 8 3/4" rear end. The factory 14" X 5 1/2" Rallye wheels fit with no issues.

FYI Factory 14" X 5 1/2" steel wheels did NOT fit my car.
 
I have original manual KH disc, recently I replaced the mc as it failed, and due to availability or stupidity or whatever, I replaced my 15/16 ("less leg effort") mc with a 1 1/32 ("more effort") mc.

The only difference I noticed with the new master was less pedal travel and the brakes came on sooner, which I like, prefer with the manual brakes.

Bottom line, the pedal is not difficult by any means and the car stops incredibly well.
 
I have the Wilwood Dynalite conversion kit on my 1969 Dart which was an original 9" brake car. They have both bolt patterns but the screw in studs are 1/2" for the 4 and 4.5 bolt pattern. It worked out ok for me with aftermarket 14" rims. I just had to buy ten 1/2" lug nuts that would work with my rims. This post is just an FYI that even though they are marketed as both bolt patterns, the stud size is not right for the standard wheels in the 4" bolt pattern.
 
if you have disk brake spindles
if you have some vented or none vented rotors of appropriate size..

the sumitomo calipers off a toyota can be made to fit... and fit with 14 inch wheels

bit of a fiddle but the mounting centres for the lugs on the caliper is 3.5 inch spaced so they bolt up to the mopar spindle mount and the offset is not too off
note the smaller hilux version was used on trucks with non vented rotors and the bigger landcruiser version was for vented..hence when fitting the small ones a little bit of work is needed with the grinder.

see here

really no need to do this anymore...its a 1990s small wheeled mopar backyard upgrade, that i catalogued for posterity, written by one time member of defunct aussie message board.
appropriate for those of us not in the US given the cost of shipping a full brake set up from a US supplier.... as we were export counties we often had disk brakes as standard so were not short of small balljoint small rotor small PCD parts second hand.

landcruiser caliper upgrade - Mopar Muscle Association UK

but illustrates that there are more ways to do this if you like a little challenge.

happy to explain australian and british terms if there are any that confound
 
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I’m in NE PA and I have a K/H disc setup from a 69 cuda
Spindle, dust shields, rotors, calipers,
Caliper bolts, ball joint bolts
Calipers would need rebuilding
4” bolt pattern
If you’re interested I can send pics and pricing. PM me
 
Mike69cuda said:
I have the SSBC small bolt pattern front disc kit. Stock 14 inch wheels fit
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If I'm reading you correctly. A 14 inch steel wheel will fit a 5.5 rim, not a 4.5. I added disc on my 69 340, that had 10" power drums. It was a cake walk with the K/H set up. I did have to drill out the lower ball joint to accommodate the disc spindle.
 
Swinger 340 said:
If I'm reading you correctly. A 14 inch steel wheel will fit a 5.5 rim, not a 4.5. I added disc on my 69 340, that had 10" power drums. It was a cake walk with the K/H set up. I did have to drill out the lower ball joint to accommodate the disc spindle.
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Well, I don’t remember that detail. I sold the 14 inch wheels awhile back. They could have been either.
 
ssbc is what i used on a 71 duster i built for a guy . we put the whole power disc brake kit on it . works great . but i've got several factory 4 bc disc setups .

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