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.)