Brad your ISC engine is called a CAPS Engine because that is the type fuel injector on this engine until the 03 ISC, the oil capacity is 20 qts and no more or it will end up on your toad (it will blow the overfill out) the Oil Filter to use is a extended drain Fleetguard LF9009, the coolant is about 10 to 10 1/2 gal and the original was a green heavy duty low silica HD coolant can get it at most truck supplys and be sure to use a supplement cooling additive. Your big round tank in the rear is the Hydro tank for the cooling fan and steering and takes 3 filters Nelson 84101B the fluid in the tank can be 3 different fluids, AW46, Dexron lll or 15/40 diesel engine oil. The Allison takes 2 filters and they come in a kit part#29548988 and fluid to fill should be 19 qts.
And no I dont know where you could get the books you need.
Walt & Will
2017 Ram Big Horn Crew C 4X4 w/ M&G