Chilton’s manual...why did it stop at ‘72 for e-bodies?

[Matt13]

A friend who is a mechanic wants to pick up a Chilton's manual for my 1973 Barracuda. Problem is, the manual is Barracuda/Challenger 1965-72. Why would they stop it there and not '74? Would this manual be helpful to me even though my year is not included?
TIA

[CudaMoparRay]

Good question, Subscribing for the answer also 

[Chryco Psycho]

Probably not enough changes to update after 72
I would recommend the factory manual instead , there may be a copy in the reference section here , it is more complete

[HP2]

Agree with CP on getting a factory manual.  The Chilton that covers 65-72 will include A body as well as E body and not have great detail on either.

THere are some places to sell vintage books, reproduction books, or you can get them as a disc.

[RUNCHARGER]

For me the most important part of a manual is the correct wiring schematic. You want the factory manual for the correct year for that. I believe Faxon has reprints.