Only real way to be sure is to check parts fiches but like I said most bikes back then used them. Only real exceptions where the 69-71 450s and the 750s. Anything from a 350, 360, 450 after 71, 500-550Fs, 400Fs, and 500T should fit if it has disk brakes.
750 models are wrong. Only reason why I know about the 450 issue is I own both the 71 and 72 models.
I use this web based fiche to do my checking, if the part numbers match they are the same part.
http://www.westernhonda.com/fiche_select.asp