demon69 13 Report post Posted April 12, 2016 Hi ThereThe rotors for the 351/390 are different to the 428/429 rotors but the specs for both seem similar. The standard caliper fits both rotors. Does anyone know the difference between the rotors, are they interchangeable?ThanksPeter Quote Share this post Link to post Share on other sites
Rsanter 152 Report post Posted April 12, 2016 I always thought the difference was between 68-9 and 1970 Difference being the bearing sizes. I don't know of any other differences Calipers are the same from 1968 to 1973 and beyond Bob Quote Share this post Link to post Share on other sites
demon69 13 Report post Posted April 12, 2016 That's interesting, look at the Centric web site which lists the rotor options... http://centriccatalog.com/Inquiry/AppResult.aspx?id=WEB_DISC&v=LD/MD&y=1969&m=54&mm=688 Quote Share this post Link to post Share on other sites
Raven R code 281 Report post Posted April 12, 2016 Bob is correct about the bearings. I believe the rotors are the same between 69 & 70 but the bearings that go in them are different. Also, spindles and tie rods are different between the years too. Quote Share this post Link to post Share on other sites
Rsanter 152 Report post Posted April 13, 2016 I belive the boss 302 and the boss 429 used the bigger 1970 bearings in 1969. For 1970 they went to the big bearings for all of them. The tire technology at the time was getting better and causing more stress on the bearings/spindles which is what drove the change to the bigger bearings Bob Quote Share this post Link to post Share on other sites
Raven R code 281 Report post Posted April 13, 2016 Bob is correct. Quote Share this post Link to post Share on other sites
