Faces only a mother could love, though the 1st, 3rd and 4th are kind of OK. A 3-71 Jimmy would make a great powerplant. Wouldn't even need a blower!
Of course, I've only ever seen them in small tracked vehicles...
I'd be afraid to put an SBC in one, but some of the V-6s would be an interesting addition. I'd never drive any of those on the street, though.