Don't see that number in my Lakewood brake catalogs {1972,1973 & 74}No brakes in the 1970,71 catalogs so they must of been new in 1972. This number is
close.{70241} A few other applications for that part. New part numbers?
https://photos.app.goo.gl/Cnb2Es1Suu3XTFGp8
https://photos.app.goo.gl/fQuQ2nhiezKXJH3t5
Dave