Disc Brake Upgrade Reference Thread

[Captainfab]

If your '70 has 6 lug discs up front, they aren't original. They could be either aftermarket rotors for the '71-'87 spindles (I believe those are the 1 1/4" rotors) or they are the '88-'98 light duty 2500 series rotors, spindles and calipers. In light of those possibilities, I would suggest taking a few pics of what you have (particularily the calipers) and post them here, and we can determine which front disc's you have. The parts are not interchangeable between the two options I listed.

Originally Posted by ozman3803

I've looked this over a couple times and maybe still missed it. My 70 2wd has 6 lug disc. On the part swap from 6 to 5, what thickness of 5 lug rotor (1 1/4?) is needed and will this work with the current disc brake caliper?