[quote=Mike B]Looks like the 1970 C60 Air Brake units were only available with the 427 engine. They had a 6.71/9.14 ratio, 23,000 pound rear with 15x7 rear brakes and either a 9,000 or 11,000 pound front axle.
Mike B :)[/quote]
Well they made one with a 366. Because I bought it from a small city and the guy who is their crew manager said his dad ordered it new in 70. And that it was all original. :)