Not trying to be critical, but an inline and a V6 are to different animals. Unless you were looking for a manual that covered both engine types.
Anyway, I have to agree with the others, those reference manuals are worth their weight in gold, especially when they contain lots of photo's, illustrations, and specification charts. I try to never get rid of stuff like that. I consider them very important tools along with my digital camera.
I found that sometimes it is very helpful to read about the same thing from more than one manual, as one may be easier to interpret, or have better illustrations.
Besides, it's fun to learn about something that you enjoy.
