I am looking for a Mesa Head that would sound like a vintage "Mesa Engineering" 1 channel head from 1978 or 1979. What new or recently released Mesa Head would sound like that amp with it's pleasant "breakup" when pushed. I know it would have to have 2 6L6 tubes but I'm not sure about any other specs. The front panel of the amp I am trying to emulate has the logo "Mesa Engineering" not "Mesa Boogie" on it. Any info on this amp or how I could best emulate the sound of it with a new Head would be greatly appreciated. And please be as specific as possible in technical terms.