Don't think I mentioned anything about that being the definition of "creative", but any Mopar engine in a Mopar bodied hotrod is far more rare than one with a small block Chevy.
I won't mention a Hemi of any generation, but why not a turbocharged slant six, or a Fenton equipped flathead six, or a straight 8 Chrysler, or a turbo 2.2, or a dual 4-bbl Poly? Maybe even a modern Mopar V6? Want something different without it being Mopar...how about an AMC, a Studebaker R3, or a nailhead Buick, or even a Packard?
Anything would be more creative than a small block Chevy...the ultimate in cheap and boring.