A couple of controversial ones - the perennial question, does a muscle car have to be American?
Gordon Keeble, '64 to '67, 327 Chevy, all manuals except one.
Jensen CV8, '62-'66, 361 Chrysler Golden Commando V8. Later ones had a 383. Mostly autos, but still rapid.
I'd love a kit of either, especially the Jensen. A family friend had one, I'll never forget going for a ride in it, it was pretty brutal.