Soooo... little update here guys!
Got the amp in a while ago.. man... that thing must have seen some nasty shit. I kid you not.... there was mouse poop in there... and more spiderwebs than anywhere else.. plus a ton of dead spiders.
But I got it up and running again!
Replaced the Fuse and Fuse holder thingy, new Jacks for the inputs and the Speaker outs too. Two caps were bad, replaced those too. The switch and the indicator lamp are both still fully functional, which quite surprised me.
Someone apparently modded this thing before me. There is some sort of DI-Circuit inside between the DEEP input jack and the Amp Circuit itself (maybe for a Bass DI... probably). There was a separate Jack on the back labeled "to mixer/PA". Whoever did it wasn't that good at soldering, so I had to redo a few joints, but the circuit works and I kept the DI-Jack (replaced that one with a new one too) and circuit.
Got some spare time today, so I started re-doing the shell... man.. that thing was beat up. But I got it looking quite nice today. A friend of mine will refinish it next week. He runs a small company that does tolex and other stuff for dashboards and stuff... so he's gonna do it for me.
PICS:
Original:

Circuit:

Headshell with new bottom plate and some woodwork done:


I'll keep this thread updated on the progress.