Re: How bad would a SH-55N sound with a SH-1n in bridge of LP?
I just finished wiring up this Dean of mine, and it reminded me of your thread. The guitar came stock with a JB bridge and '59 neck, both with matte silver covers. I removed the JB entirely (waaaay too muddy), put the '59 neck in the bridge spot, and put a PG neck in the neck spot. I also converted from 3x500K V/V/T to 3x1M V/T/T, and from a .022uF cap to two .01 uF caps (one on each tone pot). This setup is pretty darned similar to what you are talking about, as the Seth neck and the PG neck are not too far removed from one another. (The Seth would be a slightly brighter and cleaner neck pickup sound.) Also, it mimics the tone controls of the Les Paul, with a separate tone pot and separate tone cap for each pickup.
I apologize for the bad audio quality. I just placed my laptop across from the amp and used its internal mic to record the pickups.
Hopefully you can tell where I have the switch. I start with a bar chord in each switch position, with all the pots on 10, then the same thing with the tone pots on 0. Then I go back to all the knobs on 10 and play on the neck pickup with an improvised chord pattern, then try to do the same thing on the bridge (though I don't think I copied the pattern perfectly). Then I mess around with the bridge tone all the way down, then the neck tone all the way down. Then a few more chords and riffs with various switch and knob positions.
The amp is a 15W 1x12 combo. Volume on 1/2, tone on 7.5, and reverb and tremolo turned completely off. No pedals.
I think the '59N sounds far better in the bridge position than it did in the neck...and far better than any '59B I've ever played. I'm not sold on the PG in the neck slot, but it's pretty damned good. If I go to anything else there, it'll be a Seth. And I will be putting the matte silver cover from the JB on it eventually.