Well I have always been interested in engines and how to make them more efficient and make more power. Particularly the popular modifying of Ford and GM engines (302ci, 351ci, 350ci, etc.). I am looking for a book that could help me understand how a cam actually works, and what to tweak. Also, some info on strokes, when it becomes not as efficient (steeper rod ratio), etc... I know this is pretty far "out there"...but I was curious if anyone knew a good book to buy to get me on my way Just basic info on how a head's design, stroke of an engine, compression, bore, cam specs, etc...all effect an engine. Any help or suggestions would be great!