Good luck in civilian life! As far as the 403 Olds engine aren't fans of RPMs so focus on the low end power range, think all TQ with decent HP. Here's a link to a couple of Olds articles.
http://www.compcams.com/Community/Ar...?ID=1110579621
http://www.compcams.com/Community/Ar...ID=-1413219732
Hope these help.