So I just went to my local Guitar Center to pick up a Krank Rev+ head and when I got there noticed the head had EL34s in it. I know this head comes with 6550s so this threw me off a bit. I pulled up google on my phone there in the store to try and see if anyone else has heard of/done this combo and didn't find anything. I want this head and decided to put it on layaway so that I could do some research before actually taking it home.. and I guess my question is, does anyone know what kind of mods would have to go into this head to make it run el34s properly? and has anyone seen this head with el34s before? any input is appreciated. thanks!