[Amps] 11 to 6 mod

[lionel]

I aquired a Thunderbolt 305 amp. through a several piece trade of ham gear and antennas. It appears to be one of those bargain basement amps that surfaced a few years back for 11 meters. It has 4 6lq6 tubes. a driver (6lq6), driving 3 6lq6 tubes. I got a new 5 element 6 meter cushcraft beam in the trade also. I would like to know if the amp would be an easy conversion to 6 meters, and get some imput on the best mod. I have a ts680s that i intend to use with the amp. the drive power should be about right from the 680. Any hints?
 Richard
 WB4CVX