Wasn't there an "around-the-world" tour in the 1990's with two fully pax equipped DC-8-62s from MGM Grand Air? If I recall, there was a complete story with pics in an issue of Airliners Magaizine. I'll have to dig that issue up to find the details. . .but it was a very interesting DC-8 extravaganza to say the least.
Ding! You are now free to keep supporting Frontier.