bolt pattern disc brake q

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Phily

Phily

3XL, loud pipes, loud music, loud weed
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Are there any sbp disc brakes available for a 76 Dodge dart. I do have some crager ss rims that are 14" and I believe could be used for bbp. I'd like trade for some sbp discs if possible cause I do the have the money for a disc upgrade right now. If not I'll hold onto them til I can get them. Just sucks cause my grand caravan needs a few things I have to fix on it and I can't fit 5 kids in the dart lol not with the missus. Sucks the cragers won't fit my drums cashed the bolt pattern diff.
Opinions?

IMG_20170419_121832.jpg
 
so your fixing to swap from BBP drums to SPB discs?
theres a first

what would you do for rims?
spend more money on them?
 
Sbp drums is what I have lol. Right now I have stock rims with hubcaps and I don't mind them. I'd just like a better stopping for the missus as it's to be her daily driver. We live in the mountains
 
Would like nice with those cragers tho.

IMG_20170411_094712.jpg
 
diymirage said:
so your fixing to swap from BBP drums to SPB discs?
theres a first
Click to expand...

No such animal as a factory big bolt pattern 4 wheel drum brake A body.
All A body 4 wheel drum brake cars were small bolt pattern.
Only 73-up discs were large bolt pattern.
 
Jimacuda said:
No such animal as a factory big bolt pattern 4 wheel drum brake A body.
All A body 4 wheel drum brake cars were small bolt pattern.
Only 73-up discs were large bolt pattern.
Click to expand...

i saw 76 and i just figured it must be BBP
then i saw him looking for SBP discs, so to only thing that made sense to me was that he would have drums.
 
Must be a manual brake, /6 car built before January of '76. Or it's been swapped before. Starting in January of '76 there was a federal mandate for front disk brakes. And starting in '73 every V8 car got disks (and therefore the BBP). Even a lot of the /6 cars got disks after '73, power brake cars got them, towing package cars got them, there were a few other options packages that would upgrade the car to disks even if it was a /6. My '74 Duster was about as plain jane as they get, /6 and almost no options, but even it had the BBP disks.
 
Well, you could find some SBP Kelsey-Hays discs from a 67-72 A-body. There are usually components for sale in the parts section. I bought a setup 2 years ago. They now make repo discs so it's not as expensive a proposition as it was a decade ago. Cardone still sells the calipers. Make sure you change the master cylinder as well. You may also want an adjustable proportioning valve. I used the factory PV from a 73-up disc car, but it didn't do the job, so I plumbed in an adjustable one from Summit Racing.
 
Ya it was built a couple months before the disc brakes became standard. And yes it's a slant six.
Would I need more than just the spindle to make it accept the 67-72 discs or would I need to change UCA or LCA to work. And would I need the 67-72 spindles or would 74+ work.
 
I don't know for sure, but I would guess that since it is SBP it would use the small ball joint like the 67-72 cars, so you'd only need the spindles. I looked in my parts interchange manual and it doesn't even list drum brake cars for 76, so I can't say for sure. I suppose you could measure to see if the UBJ is 1-7/8 or 1-13/16.
 
mvh said:
I don't know for sure, but I would guess that since it is SBP it would use the small ball joint like the 67-72 cars, so you'd only need the spindles. I looked in my parts interchange manual and it doesn't even list drum brake cars for 76, so I can't say for sure. I suppose you could measure to see if the UBJ is 1-7/8 or 1-13/16.
Click to expand...

Nope. The 73+ drum spindles take the large ball joints. All the UCA's 73+ were the same, LBJ, regardless of BBP disk or SBP drum.

Phily said:
Ya it was built a couple months before the disc brakes became standard. And yes it's a slant six.
Would I need more than just the spindle to make it accept the 67-72 discs or would I need to change UCA or LCA to work. And would I need the 67-72 spindles or would 74+ work.
Click to expand...

You'd need the 67-72 KH disk spindles and 67-72 UCA's with the small upper ball joint. LCA's are the same, although I'm not sure the 73+ drum spindles used the same lower ball joint as the KH disk spindles.
 
No, the LBJs are different for disc and drum, though it is only because the bolt holes are drilled to a different size (1/2 vs 9/16, IIRC). If you have a drill press you could fix that, but you'd still need the big bolts. It's not hard to find the whole setup for a K-H front end, which would be the simplest thing.
 
I don't know what kind of situations your missus is gonna get into, but
IMO
10" Drums should be more than adequate. You can always downshift on the long downhills.
Maybe splurge on an upgrade to the shoes and get the drums machined.Find a brake shop that can regrind those new shoes to fit the machined drums. Otherwise it's gonna take a long time before the brake performance will come around.
I had a 69 340 Barracuda with 10" drums all round. It had no problem slowing the car from 100 to 30.........multiple times.

Btw
I don't like Unilugs on the front. I don't like Unilugs at all, but especially not on the front. And I really,really don't like Pre-Owned Unilugs.
If you have your heart set on using them, make real sure that you have the correct length shank-nuts, and the correct AS-NEW washers.Clean both the mounting surfaces of all rust and dirt. Make sure the studs are in great shape
Torque them.
And check the torque every 100 miles, at least 3 or 4 or 5 or more times until you trust them to stay tight.
If your shank-nuts are too long, do not use common hardwarestore washers to adjust the length. They are too soft and will not hold the torque.
If that car is making daily trips thru the mountains, I highly recommend NOT to use Unilugs.
 
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Ok well it sounds like I may just sell or trade the rims and just keep thems. It's not going g all out performance. May put a diff cam in it and I will be putting the super six set up in it and that's it as long as it can climb the steeper grades ok. If not then it's gonna be a whole different ball game.
Thanks for the input
 
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