John, the book is called
The High Speed Internal Combustion Engine by Sir Harry Ricardo. Prices in used books stores (online and street-side) run from about $300 -$600 depending on age and condition. Ebay is usually a little cheaper, as the sales are from individuals. But I haven't seen any go there for less than about $200 since the late 90's. (I don't see them all, though.)
First published in 1927, there were (IIRC) 5 reprintings of several thousand copies at roughly one decade intervals. I think the last edition came out in 1970. While the book is a real classic, much of his work has been incorporated into later books, whether openly acknowledged or not. Sir Harry was not a "wordy" man, and the reading can be heavy going, as he wrote it for his fellow English engineers between the World Wars. Sir Harry was convinced that they would have to fight the Germans again, and as a staunch English patriot, he wanted to ensure that the latest thinking and research was available to his fellow engineers in England's military industrial complex.
Nonetheless, it is astounding to nearly all first-time readers that nearly everything mechanical and analog ever developed for spark ignition engines is included in his work, including lots of neat stuff no longer in widespread use (or regaining favor, like water/alky injection to delay detonation).
Start saving your lunch money, Bro...!
Edit: Oh yeah, it was his tireless upgrading of English engineering that earned Sir Harry his peerage. The Merlin engine that powered the Spitfire was his direct brain child.
I put a stock 300-6 in the bronco for now.
