70 duster: updating, and a no-dough pro-touring makeover
As far as I know, I am the only one messing with the C5 calipers for a Mopar. Doesn't mean there isn't anyone else, but I haven't seen anything.
I am doing just as you are planning, cut some rotors down and had a plate laser cut to mount the abutment to the spindle. Only other thing I did that you didn't mention was to have the snout of the rotor/hub turned to match a Mustang hub so the Cobra rotor slips on without modification. Nice thing about that is if it is just the rotors that wear out on a track day, I can just swap the rotors without having to have some machined.
Only concern I have is that if the Vette's are having problems with the rotor cracking, I'm not sure how the Cobra one will work. The Cobra rotor is about a 1/16" thinner than the GM rotor, but a touch bigger in diameter. Being thinner might make it even more susceptible to cracking.
I'm sure you are aware of this, but the C6 calipers are bigger across the top that the C5 calipers. I'm really tight to the wheels I have, don't think I could run C6 calipers without going to an 18" wheel. Maybe your Bullet wheels have more room, don't know.
I have the plates cut, just need to do a final mockup to see if I need to shim them, and then source some brake lines.
Here are some pictures from the final mockup before I cut the steel plates. This was with a wood buck I painted black.
Note that I plan to swap the spindles side to side so I can put the calipers to the rear of the wheel. Probably not a big deal but I think it best to duplicate the original location if possible.
I wouldn't go with the Jeep rear disks, myself. You will need a custom axle that is longer to account for the thicker mounting plate and I think they are solid rotors. Might have that wrong, but that's what I am remembering. I know they aren't a bolt on for the 8.75", but they do fit a 8.25" with a minimum of effort.
I've been planning to work on using a late 80's Supra rear disk setup. I just plan to build a mounting plate that bolts the caliper in the right location and weld the plate direct to the axle tube. The e-brake is a mini-drum setup, so I was going to just build a new center for the backing plate the e-brake mounts to. This gave me the option to go to a fix caliper in the future. Plus they are a vented rotor, and the bolt pattern is a match already. The center register will need work, too. Haven't made any progress on that project, though.
As far as I know, I am the only one messing with the C5 calipers for a Mopar. Doesn't mean there isn't anyone else, but I haven't seen anything.
I am doing just as you are planning, cut some rotors down and had a plate laser cut to mount the abutment to the spindle. Only other thing I did that you didn't mention was to have the snout of the rotor/hub turned to match a Mustang hub so the Cobra rotor slips on without modification. Nice thing about that is if it is just the rotors that wear out on a track day, I can just swap the rotors without having to have some machined.
Only concern I have is that if the Vette's are having problems with the rotor cracking, I'm not sure how the Cobra one will work. The Cobra rotor is about a 1/16" thinner than the GM rotor, but a touch bigger in diameter. Being thinner might make it even more susceptible to cracking.
I'm sure you are aware of this, but the C6 calipers are bigger across the top that the C5 calipers. I'm really tight to the wheels I have, don't think I could run C6 calipers without going to an 18" wheel. Maybe your Bullet wheels have more room, don't know.
I have the plates cut, just need to do a final mockup to see if I need to shim them, and then source some brake lines.
Here are some pictures from the final mockup before I cut the steel plates. This was with a wood buck I painted black.
Note that I plan to swap the spindles side to side so I can put the calipers to the rear of the wheel. Probably not a big deal but I think it best to duplicate the original location if possible.
I wouldn't go with the Jeep rear disks, myself. You will need a custom axle that is longer to account for the thicker mounting plate and I think they are solid rotors. Might have that wrong, but that's what I am remembering. I know they aren't a bolt on for the 8.75", but they do fit a 8.25" with a minimum of effort.
I've been planning to work on using a late 80's Supra rear disk setup. I just plan to build a mounting plate that bolts the caliper in the right location and weld the plate direct to the axle tube. The e-brake is a mini-drum setup, so I was going to just build a new center for the backing plate the e-brake mounts to. This gave me the option to go to a fix caliper in the future. Plus they are a vented rotor, and the bolt pattern is a match already. The center register will need work, too. Haven't made any progress on that project, though.
