by cjbiagi » Fri Jul 17, 2015 2:31 pm
When I did my 75 Monza (which still had the small early style brakes) I also swapped the spindle to the later version. I did this before the internet so I had nothing to go by except GM part numbers. I have heard that others have kept the stock spindle and just swapped the rotors, pads, calipers and hardware. There may be very minor filing but nothing to worry about. Very few cars ever had solid front disc rotors, it was really a cheap design at the time to keep costs down I guess. When the Monza was introduced and went through testing the front brakes really got hot and were cause for a lot of negative criticism. GM responded the very next year (pretty fast for them) with the redesigned vented rotors and larger caliper piston and more material on the brake pads. They also upgraded the rear brakes at the same time to the same setup already in use on other GM cars, the standard 9.5 x 2 brakes.
Clyde.........75 Monza 2+2