First of all, I have to say that the TDPRI forum has been very impressive! I have a '59 Bassman "boutique" built by some guys who work at Mojotone some 16 years ago. The circuit is an exact copy of Fender Bassman circuit, which makes it basically the same as the Marshall. It has Mojotone speakers made to break up. Last amp tech said I can get headroom by replacing speakers with 4 10" Jensons. Will this work? Any other way to get headroom? I play surf, sometimes with a Tele.