Big brakes

No, not correct. Only for 73+ E-bodies. The ‘70-‘72 E-body spindles had a different sized wheel bearing compared to the 73+ A-body spindles.

Basically, Chrysler unified their brake design in ‘73, using the same brakes across all the platforms except C bodies and trucks. The A/B/E/F/M/J/R brakes interchange (even the bigger 11.75” stuff with the right brackets) and the only difference is the A body spindles are a smidge shorter. But before ‘73 you can’t just mix and match stuff without doing your homework first. The ‘70-72 E body disk spindles look like the 73+ spindles, but the wheel bearing diameters are slightly different.