did you figure i nthe offset difference of sbp drums to bbp drums?
We didn't put much effort in trying to get the set up to work on the 8.75. When we ran into the off set problem we decided to try them on a 8.25 that we had laying around.
did you figure i nthe offset difference of sbp drums to bbp drums?
And it's getting worse...but why ruin this thread and have the mods shut us down? :-D There's some offsetting reasons to continue here in Upstate. The wife has a job with the state here in Elmira. So the pay is good, the bennies are great. And since dodgepower needs the knowledge and know-how to bring his '72 Duster back to life, helping the 14 yo young gun is more than worth it, idiots in Albany be damned.
LOL! I still have a lot of family up there, and hopefully I'll be making a road trip up there with my dad in the spring. Can't wait to visit a state with seasons. We have only two down here: 1) Really friggin hot 2) Everything is Dead and Brown...but at least the drag strips are open nearly year round (only close for December/January for surface maintenance).:-D
It looks like I'll be waiting until January to get my brake/rear axle upgrade completed on the Dart.
While it seems everyone wants to sell you the GM "metric" calipers for "their" conversions, the various Ford/Lincoln rear disc brake setups from over the years have calipers that are probably just as common, with the 38MM Varga rear caliper from 94 and newer Mustangs the most common and easiest to get. It also has the parking brake built in and would require only cable adaptation to get a working parking brake.
In the spring, after the weather breaks, I'm figuring to use 54MM single piston with parking brake calipers from a Mark VII on my stock axle ("B" body, LBP to Duster), stock roller bearing, 8 3/4 along with the matching 11 1/4" diameter Lincoln rear rotors (rotor's center pilot hole will be matched to the axles).
The 73MM front calipers these rear discs came matched with from the factory are very close in size to the 2 3/4" (69.85MM) Mopar ones and should balance out nicely with an adjustable proportioning valve because the slightly smaller Mopar caliper is going on the 11 3/4" diameter "cop car" rotors (up from the just under 11" Lincoln ones).
Making up "C" shaped caliper brackets out of 3/8" plate to mount on the inboard side of the axle housing flange with longer bolts would allow use of the stock bearing retainers.
A master cylinder with a 15/16" or 1" diameter piston should be about right for manual brakes (I think the one the Duster has now is the right diameter, but it might not have enough reservoir capacity to accommodate rear discs), and a Mustang 1 1/6" disc brake master could be adapted to the "A" body bracket, booster, and linkage for a power setup.
I'll do a step be step photo essay and share when the time comes.
The 15" big bolt pattern ralleys we have fit okay it's the 14" small bolt pattern ones I have that hit the calipers.
We actually have one of the 15" on there now and it clears fine.
so did the conversion to an 8 3/4 actually work??? I was reading a little further back and saw you saying that it didn't work out. I'm just interested. Are the very first pics you posted from the 8 3/4 swap or the 8 1/4??
the rear disc have a short rubber flex hose between the caliper and hard line. I'v got the whole rear end out from a grand cherokee just the other day. Brakr cables and all.:-d:-d:-dit looks like that is a sliding caliper so if you hooked up the hard line for the brakes then everytime you apply the brakes you will be flexing the steel line when the caliper moves. Not a lot but how many flexes can the line take before it breaks? Might want to look into short flex lines. Just a thought.
Larry
To answer your questions I don't believe there to be a true "bolt on" rear disk assembly for the 8 3/4. Not in the perspective of just bolting on and go with just a few, no hassle mods. Not in the sense I believe you're looking for from the tone of the first post quoted above.