My advice is not to. There is a filiment supply mismatch.
6L6 = .9 times 2 equals 1.8 amps
El34=1.5 times 2 equals 3 amps
There are mods, which I did, on an epiphone. Not worth the effort. If you attempt to modify, your warranty is history. Also would make your amp 'suspect' on trying to sell.
