My bad, I meant to say that you could use Wilwood (not Raybestos like I wrote earlier) hats and rotors. They would slip on the drum hub, just like Cobra Automotive kit. I believe a 1.59" offset hat is needed, but they offer them in several sizes. For part numbers, check the Wilwood site.
The 68 Ford rotor mounts to the back of a disc brake hub, not to the front of a drum brake hub.
you are correct, i had forgotten about the disc and drum hubs being different but honestly can't remember what the differences are right now. i knew there was a reason i was saving my original 69 disc hubs though.
hmmm, well this changes things a little, it's also probably why CA has made changes to their bracket from the original DOZX bracket since they do use the drum hub on their kits. i'm sure there must be another 12" rotor that would work with the drum hubs though. could even be a mopar rotor for that matter since they use the same 5x4.5 bolt pattern or even redrill something else to fit. then again my idea of using some kind of one piece rotor from a 72 t-bird or a 70-72 LTD (they have different hat heights) could work well too.
do you know the exact height dimensions of the hub/rotor combo? if so i could probably find a one piece rotor that would work.
ok got some height measurements from napa online.
68 LTD rotor (this is the rotor used on the DOZX kit) height 2.31, this does not include the added height of the hub which is right at 2" which comes out to 4.31"
72 ltd one piece rotor-height 4.525"
72 t-bird one piece rotor-height 4.807"
these are all 12" rotors (actual 11.72") so they are all identical in that dimension and all are 1.8" thick as well. they vary in price from $93 for the 72 ltd rotor to $155 for the 72 t-bird rotor and the 68 LTD rotor comes in in the middle at $125.
i think our best bet is the 72 LTD rotor which has the closest dimensions to the 68 rotor and hub combo and is also the cheapest price wise, there is also a company on Ebay called rotor pros that has the 72 ltd rotor in a drilled and slotted version for $94 for the pair. i think that would be the best bet right there, drilled and slotted 12" rotor that will work on the mustang drum spindle and use the big 4 piston calipers, it also uses the same wheel bearings as the 70 mustang which also means that you can use the 67-69 bearings in these rotors by changing the races just like any other mustang rotor. this "SEEMS" like it would be the best option for a drum spindle without having to try to hunt down the "correct" rotor and disc hub plus it's cheaper and is available in drilled and slotted to boot.
it can also still be used with 15" wheels for those of use are hold outs from the stone age.
BTW, i'm fairly certain that the SSBC big force 10 4 pistons caliper is an aluminum copy of the big K/H 4 piston caliper and it does have internal crossovers as well for anyone that wants to pay the bucks for them, however they could also be copies of the 4 piston vette caliper as well, can't say for certain.
68 LTD rotor (this is the rotor used on the DOZX kit) height 2.31, this does not include the added height of the hub which is right at 2" which comes out to 4.31"
72 ltd one piece rotor-height 4.525"
72 t-bird one piece rotor-height 4.807"
these are all 12" rotors (actual 11.72") so they are all identical in that dimension and all are 1.8" thick as well. they vary in price from $93 for the 72 ltd rotor to $155 for the 72 t-bird rotor and the 68 LTD rotor comes in in the middle at $125.
i think our best bet is the 72 LTD rotor which has the closest dimensions to the 68 rotor and hub combo and is also the cheapest price wise, there is also a company on Ebay called rotor pros that has the 72 ltd rotor in a drilled and slotted version for $94 for the pair. i think that would be the best bet right there, drilled and slotted 12" rotor that will work on the mustang drum spindle and use the big 4 piston calipers, it also uses the same wheel bearings as the 70 mustang which also means that you can use the 67-69 bearings in these rotors by changing the races just like any other mustang rotor. this "SEEMS" like it would be the best option for a drum spindle without having to try to hunt down the "correct" rotor and disc hub plus it's cheaper and is available in drilled and slotted to boot.
it can also still be used with 15" wheels for those of use are hold outs from the stone age.
BTW, i'm fairly certain that the SSBC big force 10 4 pistons caliper is an aluminum copy of the big K/H 4 piston caliper and it does have internal crossovers as well for anyone that wants to pay the bucks for them, however they could also be copies of the 4 piston vette caliper as well, can't say for certain.
actually at 94 bucks a PAIR i think the drilled and slotted rotors from RotorPros on ebay would be the most cost effective solution, provided they'll work which i'm fairly certain they will. i will probably try going that route myself eventually. i also kind of like the fact that these rotors are a one piece design for ease of maintenance as well. i just keep hoping Degins will change his mind about incorporating a caliper bracket cast into his drop spindle so i can use his spindle with these brakes.
the rear disc kit used the stock front calipers and rotors after you had removed the hub.
the rear caliper bracket could very easily be made from a piece of 3/8" steel and welded on the housing or bolted to the housing flange
Does anybody know the center to center distance of the mounting ears of the small K/H four piston calipers?
Here's a picture of the bracket:
The vertical distance of the mounting holes on the spindle is 2.5" and judging from the picture, the caliper mounting holes are only a little further apart. Maybe 2 3/4"?
The reason I'm asking is that mounting holes of the big K/H calipers are 4 7/8" apart. So, if the caliper would clear the stock disc brake bracket, you could make a simple bracket that bolts to the small caliper bracket, to which you can mount big caliper. It would consist of the (blue) 1" wide, 1/2" thick and ~6" long piece of steel with holes for the caliper (4 7/8" apart) and holes for the caliper bracket (say 2 3/4" apart) This part would then be moved inwards by a (red) 4" long piece of steel of apropriate thickness, also with mounting holes 2 3/4" apart. The caliper mounting ears would then sit on the outside of the bracket (instead of to the inside, like both the small and the big K/H).
This is actually an advantage, because this is how it is mounted to the spindle on Thunderbirds etc. If you want to mount the big calipers to the Cobra Automotive or DOZX brackets, you need to drill out the threaded holes and spot face the new mounting position on the other side of the mounting ears (it's rough and not very even). With the above mentioned bracket, the caliper would bolt right on with not machining. It all depends of course on if the caliper clears the regular stock caliper bracket. And, great for bnickel, this method may even work with degins cast-in K/H mounting brackets on the new spindle
Here's a picture of the bracket:
The vertical distance of the mounting holes on the spindle is 2.5" and judging from the picture, the caliper mounting holes are only a little further apart. Maybe 2 3/4"?
The reason I'm asking is that mounting holes of the big K/H calipers are 4 7/8" apart. So, if the caliper would clear the stock disc brake bracket, you could make a simple bracket that bolts to the small caliper bracket, to which you can mount big caliper. It would consist of the (blue) 1" wide, 1/2" thick and ~6" long piece of steel with holes for the caliper (4 7/8" apart) and holes for the caliper bracket (say 2 3/4" apart) This part would then be moved inwards by a (red) 4" long piece of steel of apropriate thickness, also with mounting holes 2 3/4" apart. The caliper mounting ears would then sit on the outside of the bracket (instead of to the inside, like both the small and the big K/H).
This is actually an advantage, because this is how it is mounted to the spindle on Thunderbirds etc. If you want to mount the big calipers to the Cobra Automotive or DOZX brackets, you need to drill out the threaded holes and spot face the new mounting position on the other side of the mounting ears (it's rough and not very even). With the above mentioned bracket, the caliper would bolt right on with not machining. It all depends of course on if the caliper clears the regular stock caliper bracket. And, great for bnickel, this method may even work with degins cast-in K/H mounting brackets on the new spindle
one more time. the stock 68 tbird rotor uses the SAME wheel bearings at the 65-69 mustangs, thus they go on the stock 65-69 V8 spindles.
most rotors come with races installed and you can use the old bearings if they're in good shape, no need to change them and since the rotor should have new races already installed you don't have to worry about a wear pattern. also even if you do have to install new races you can buy them seperately and install them with a brass punch or drift, or even a steel punch or drift in a pinch. i have never used a press to install races, not even once.
that, and by the time you are ready for new rotors, or resurfacing the rotors, you should be cleaning and repacking the wheel bearings anyway.
I wouldn't worry too much about ease of maintainance. A decent quality rotor should last a long time, even on a daily driver and about forever on a weekend driver. If you plan on a lot of open track weekends of other sorts of racing, then I can understand that it becomes more important.
Anyway, here are some pictures and a drawing of the Cobra Automotive brackets. With a disc brake hub and a Raybestos 6008 rotor (68 Full Size Ford), and after I spot faced the mounting surface on the mounting ears of the caliper, I needed to move the caliper ~1/8" inboard with spacer rings, so the offset of the caliper mounting ears was not quite enough. They are probably correct for Cobra Automotive drum hub and Raybestos hat+rotor combo.
Anyway, here are some pictures and a drawing of the Cobra Automotive brackets. With a disc brake hub and a Raybestos 6008 rotor (68 Full Size Ford), and after I spot faced the mounting surface on the mounting ears of the caliper, I needed to move the caliper ~1/8" inboard with spacer rings, so the offset of the caliper mounting ears was not quite enough. They are probably correct for Cobra Automotive drum hub and Raybestos hat+rotor combo.