What is your source for the 'Bill Sheehan notes' Jon? Bill has identified camber errors stemming from the unorthorised copying of his notes in the Companion many, many years ago.
Edit: Having just looked up my copy of the companion I find I have a hand written note claiming for 1924-5 rear springs, 5 leaves and 6.5" camber
Edit: Having just looked up my copy of the companion I find I have a hand written note claiming for 1924-5 rear springs, 5 leaves and 6.5" camber