Hi bass!
Strange things, as always.
I thought about a conversion too when I looked at it, but first, the resistors’s placement doesn’t make much sense and second, it was made on just one socket…
I think I could just take them off and see. They are not good for bias testing either… The resistors that control plate and grid are ok, so nothing bad should happen. Don’t know why on the schematic the value for R39, 40, 45, 46 it says “PR1” instead of 4.7 like mine… Some schems say 10ohm instead, I think ampeg liked to mix things up a lot.
Thinking about it, the two new electrolytics could be a substitution for C19 – but I have to check this afternoon.
I’ll put the bias resistor back to specs, but the real question is (something I always get confused about): more resistace=cleaner, or the opposite? Maybe the amp was running too “cold” and the overdrive I was hearing was some kind of result of that?
I’ll try to contact methodofcontrol immediately (yes I know, I’m at work now… but I’ve got nothing to do!)

PS I just noticed I misspelled the title of this topic… that’s sad.
have anice day!!! 😕