Take a look the Aeromomentum engines here:
They seem to be very well developed, and the proprietor is a member here. Even if you don't choose one of their products, it will still give you an idea of what a modern automotive engine will wind up looking like when adapted...
That was pretty nice workmanship by that little girl! ;)
The Super Menestrel is right up my alley. I picture an open cockpit version, more in keeping with the Turbulent, Jodel D.9, etc. I don't have the space to build a one-piece wing, though.
I have borrowed a copy through Inter-Library Loan at my friendly, local public library. Easy and free, but requires patience. That might be an option, to tide you over while you look for your own copy.
I spent a few years working at National Instruments, in a non-technical role. That was my first exposure to data acquisition systems. The things our customers did blew me away. I am still fascinated by this stuff, so keep posting!