Is the 'Odds-n-end' engine an engine that needs plans and drawings? Surely you design and build around the odds and ends you acquire? I have in mind an odds and ends engine and am actively accumulating useful parts.....got enough for about thirty at the moment!!!!!!!!!!!!!
John is correct. "The Shop Wisdom of Philip Duclos" book does include the Odds'n Ends engine. There is a copy available on eBay right now.
The engine was originally featured in Home Shop Machinist Magazine, beginning with the Nov/Dec 1986 issue (I believe it was concluded in the following issue), so there's another possible source for plans.