MST3K did an epsiode on the Sandy Frank compilation movie of Mighty Jack. It is so boring that even the MST3K crew had a hard time coming up with material for it. It was released in the set with Time of the Apes from Shout Factory. Look through the DVD thread for info on that release.
"The Bird did not look like Rodan, but he sensed it was the spirit of Rodan."
Mike Hanlon (It by Stephen King)