by cjbiagi » Wed Dec 27, 2017 10:40 pm
I did this decades ago on my 75 Monza which had the same small rear Vega brakes. As I recall, it was a bolt on affair if you get the later H body rear backing plate and everything else. The only issue was the center pilot hole on the later H body drums is slightly smaller than the pilot on the rear axle. So I had to file or grind a little material off the center hole on the drum to allow it to slide over the axle. No big deal.......
Clyde.........75 Monza 2+2