Guys:
I have always had an interest in virtually all inline fours and sixes (and straight eights too) but got hooked on the 240/300 inline Fords sixes after reading Ak Miller's 240 build up artile in the 1967 "Engines" book.
I bought a copy of Leo's book when it first was published and have read it cover-to-cover many times, finding any number of tips and ideas that apply regardless of the brand of six. I can only wish we over in the 240/300 Ford camp had a similar reference book. Buying a copy of Leo's book is worth the investment many times over.