there will be some build up of rust and so forth on any caliper. i usually have to take a little metal off the sides of my new pads so they will slide in easily. technically perhaps one should clean the caliper but the pads are a lot easier. i have a grinder in my garage and a few minutes on each edge and they will slide in just fine.

no difference between ate and bendix in this matter.

good luck

tom w

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.