Just in case it isn't already obvious, Boston Strong Girl is played by a man in drag.
The referee is played by Gene LeBell, an actual wrestler who'd gone on to a lengthy career as a stuntman and actor.
In the title the term "Rass'lin" is the hillbilly equivalent of wrestling.
"Rebecca of Donnybrook Farm" is a play on "Rebecca of Sunnybrook Farm."
A rare in person appearance by the voice of Fred Flintstone, Alan Reed.