As someone who upped an HD version of Rad about a year ago, I can say that it isn't a matter of cropping. The movie was open matte on LD and VHS, and the anamorphic widescreen version crops out only unneeded information that was never meant to be seen in the first place.
Have you put it on BitTorrent lately? I'd love to have a better quality version of this. My old one is VHS sourced.