After listening to his show for the better part of a decade, I think Bell is very far to the right -- his show used to be much more about the economy collapsing in the 90's and the jackbooted, black-helicopter UN takeover of the U.S. Ten years ago his sponsors were emergency supplies from C. Crane radio, a year's-worth-of-food company called Golden Eagle, and buying gold (the commodity or actual gold I've never been able to sort out. It's strange to hear Randi Rhodes plugging the same kind of thing.)
He seemed to sincerely think there was a secret government within the government and that they were into keeping secrets and hiding frightful technologies (like artificial weather alteration.) It was difficult to tell which other specific conspiracy theories he believed in and he never called guests on internal contradictions: each night's guest was portrayed as just as plausible as the prior night's guest, even if their theories canceled each other out.
(And although Art Bell claimed to use no screener, I never heard a skeptical caller until very recently in Noory's tenure.)
You may want to look into what Art Bell has said on ham radio a bit more ... and at the start of his career doing local, political radio. If I had to guess, I'd suppose FOX is too tame for him -- but it's hard to tell what he thinks now since he isn't on the show seven nights a week. (That said, I'd love to hear a former guest (the one who said you can get the truth out of people by playing their voices backwards

) talk about Shrub ... wouldn't you know the last time he was on the show it was to pick on Clinton. Hm.)
All that said, Art Bell has a *great* voice and delivery and none of his competitors (or guests hosts) have equalized him ... and I miss knowing what's going on on the militiamen/survivalist end of the spectrum, where even the most conservative elected Republican is a dupe and a patsy for some sort of sinister inner cabal.
Also, Bell was such a radio guy (he told a hair-raising story of trying to install a ham antenna on the roof of the Manila high-rise where he and his hew wife lived) that I figure C. Crane is probably terrific radio company.
-FedoraLV
P.S. I agree, Peregrine Took, about drama: Art Bell turned a caller who claimed he had captured ... something ... with a garden variety bug zapper into compelling radio. (I'm not kidding.)