A P90 in the neck of Les Paul will sound sweet as... but I'd think you'd be better off (for what you want) with just a not-so-hot humbucker instead, something more vintage in the bridge position. Maybe both?
I'm only searching for a tight, punchy, attacking, clear and articulate neck pickup for playing clean stuff and light overdrive stuff...I can't understand why a P-90 won't deliver that sound? I always thought a P-90 would have more attack, tighter bass and less (jazzy) smooth sound compared to a humbucker......
By the way: Do I have to change the original Gibson electronics for the Mississippi Queens?
It really depends, in a higher gain situation, IF you set up the pickup quite high so it will take enough string action, you might have a winner, it also might be it wont cut trought the mix, allmost impossible to say really so do try that with the BFG.
It is said that many newer gibsons with the BB's have 300k pots, i have tried the BB's in a CS and those were EXTREMELY trebly IMO. It wont be difficult to determin which pots you have and to change them.
Otherwise if you have the feeling you need even more brightness, there are also 1000k CTS pots......
There are so many options and variables you can even make poop sound terrific.
FWIW, a friend of mine playes some old beatup MIJ strat, sound horrible traight into the amp, very dry/middy and no sustain whatsoever. But when he plugs it into his rack it just sounds like you standing next to friggin hendrix.
EDIT: I personally think the best cutting neck humbucker is still an alnico 2 pickup, it just needs to be fairly tight. And yest that will also give you that vintage bluesy sound, you could try a '61 ressue SG which have those in the neck position, will give you a rough idea. The '57 classic HB's from Gibson are not very tight though.
