OK, heres the scoop on these. If you're referring to the 209 series pn PDF, they deal with the M44A1 and M44A2 chassis. This means they cover all the -A1 trucks with the LDS427 as well as the -A2 trucks with the LD/LDT465 engines. If you're dealing with paper manuals, there is a series from the mid sixties that cover gassers, -A1 and -A2 engines. In the mid sixties series there's a -10, -20 and -35 (yes 35). With the later 209s there's a ton of manuals for instance, the -10 is broken into -10-1, -10-2, -10-3 and -10-4. That series has a bunch of that broken volumes. The -361 series is the latest stuff for the Multifuel deuces and covers only the M44A2 trucks. You won't find them on disc but there's a whole other series of deuce manuals for the gassers. The series is from the 50s and have titles such as TM9-819, TM 9-1819, TM 9-8022, TM 9-8023-1, TM 9-8023-2, TM 9-8023-3 and bunches more. Need more info, ask!