Check this out: http://www.moyermade.com/chevyV8.html
A working V8 made very, very small ...after a chevy but still very cool. There is even videos of it running. I wonder how long it can run with the gas tank it is on.
His attention to detail is fabulous - truly a beautiful model.
Don't forget the original - http://www.conleyprecision.com/ - these guys have been building these for many years now, even used to make a Cobra to put 'em in. There are videos on the site to check out. Bring a deep wallet - for a REAL toy, anyway