I wanna use my classic 30 more often but the preamp section is feedbacky when using other pedals but i love the tone of my english muff'n and distoriton +, so i was wondering. What if i plug my guitar into the english muff'n (it's pretty much a preamp) then plug into the effects return of the FX loop and use the amp's power section.

So baisically:
Guitar-Distortion +(maybe)-English Muff'n- Amp's FX Return

Would this work as a way to bypass the amps pre amp or cause bad things to happen?
well how about you try to do it and tell us what happens, then we will all know that we should never try it