Getting a similar Shop Manual

Hello all again. Coming at you guys with another questionably dumb question.
So I have a 67 barracuda and I'm wanting the (you should definitely have this) shop manual for it. However, the 1967 shop manual lists several non-barracuda cars for 67, and a barracuda under the 1966 section (unsure why but I know a 66 barracuda is NOT what I want, different gen car). SO should I get the 67 manual and just know that all the cars are basically the same? OR should I get a 68 manual b/c the 68 barracuda will be 99% the same car minus some cosmetic details.
Wanting to use it for some questionably able DIY work (engine, rear end, brakes, normal servicing, etc.)

Masters Manuals are the best for period correct compilations of procedures.

Anyone offer alternatives?