Nice, dude! Orange tolex rocks. I wouldn't worry about the grills at all. Definitely go with KT88s in that thing. I run two in my 5150, which is a constant surgery victim, and I love em. I do swap out every so often for a quad of NOS GEs I picked up awhile back, but mostly it's KT88s. The bad parts of the cold stage, that we both have, are reduced and it's "naturally" fatter without having to set the resonance as high and the highs are smoother. Pinches and palm mutes are especially nicer on KT88s. But that's my ears, not yours or anyone else's. Worth it to try for sure.
