I'm thinking of buying new disc brake spindles and caliper brackets to go with the spindle from the same supplier.

My questions are:
1. Is the drum hub and disc hub different?
2. If they are different, then a rotor will not fit onto a drum hub, correct?
3. If the disc hub is dfferent from the drum hub, then, will the tread width be different?

Thanks for the answers...... :confused:

the offset is different on the disc hub as compared to the drum hub, but that is the only difference. you can use drum brake spindles when switching to disc brakes. all you have to do is machine the upper bolt hole down a bit. go to David Pozzi`s website. He has a all of your questions answered on there and it is very informative. you can also see the brakes I did on there. maybe you`ll be interested in that setup. it`s very cheap, has very good braking performance and you can use 15 ralley wheels with it if you want.

Can you elaborate on "the offset is different on the disc hub as compared to the drum hub, but that is the only difference."

The drum hub can be used, correct?

yes, the drum hub can be used. I used mine. Chevrolet used drum hubs when they designed the JL8 brake option too. JL8 brakes are nothing more than corvette brakes on a camaro. I`m not sure the exact measurement, but the disc hub has a deeper offset and would make your tires deeper in the wheel well. everything is laid out on David Pozzi`s website.

A drum hub and early corvette rotor is what GM used on the JL8 four wheel disc option in 68/69.

You can substitute a 70's GM pickup truck single piston caliper for the JL8 four piston iron caliper and save weight and much $$$$.
Buy a reproduction 69 std single piston caliper bracket and add metal and re drill the mounting holes to move the bracket out radially 3/8" to allow for the larger dia rotor.

This is what I have dubbed "CBB" for - Cheap Big Brakes. Rotor is 11.75"X 1.25".
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A normal drum to factory std discs requires a replacement hub/rotor in one piece.
Machine the upper boss on the spindle shorter, specs are on my web page.
Buy a caliper bracket and calipers for a 69 Camaro, which used single piston calipers.
rotor is 11" X 1".

Thanks for all the replies from everybody.

Sometimes you wonder why the manufacturer, any manufacturer of anything, didn't plan alittle better and used the same parts as much as possible. Would have been cheaper to make, to store, to pack, and less cataloging. But then, more people would be out of a job, so I guess variety is the spice of Life........

Sorry guys, didn't mean to rattle on, but your replies will be remembered and used !! :D

Thanks Mako and David.
I've had Davids site bookmarked for years now, but I never noticed anything in there about the 2 hubs having a different offset. Ya learn something new everyday around here! smile.gif I knew both could be used.