I've been in exactly one - a 1974 C3 with a T-top, if I recall right.
I'm only 5' 10", but I had NO room to myself, even in the passenger's seat. My left knee was spread over the console, my head was caressing the T-top, and my arms were looking for a place to go during the entire ride. Even if I could detach them, they wouldn't have fit in the cubbyhole behind the seat. Boo.
No thank you. If it's not a Mopar, at least I can be happy sitting on the floor in my comparatively roomy '71 Mustang.
-Kurt