it should drop in, but make sure your plug in pickups are the 4 wire type or they won't split. I haven't messed with the circuit boards in a few years, but iirc some pickups with the plug in are only 2 wire
Well, my stock 57 classics are wired for splitting BUT unfortunately it looks like the Push/Pull circuit board is too tall to fit in my Les Paul Classic Lite.
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I don't see why it wouldn't. My '14 MM had the same thin body and had a PCB, it was tight, don't get me wrong, but it fit. You would probably want to adjust your nuts though
I am somewhat curious why you want to swap IN a PCB?
Why not just put in a non-PCB harness? It'll probably cost you less than sourcing a Gibson PCB one and you could end up with better components, component brands/models/values of your choice, and the wiring schematic of your choice, as well as opening you up to easily swapping in any pickups, and being easily serviceable.
I've never heard of someone wanting to put a PCB harness into a Gibson.
You're exchanging a small amount of labor for a great amount of limitation.
Well, I can at least help with some measurements.
A full size CTS push/pull pot needs 1" from the inside of the cavity to the back of the control cavity cover plate.
One of the Alpha mini push/pulls is only slightly longer, needing 1 3/32" clearance.
You can try wiring your guitar up "50's style" (the way the tone pots/caps are connected to the volume controls) and you should get some more brightness and clarity. Might find you don't even need coil splits. It's certainly difficult to do that on a PCB, but I think some have cut traces and put in jumpers to do it. You can find a drop-in 50's style harness, too, if that's more your speed.
Why not just put in a non-PCB harness? It'll probably cost you less than sourcing a Gibson PCB one and you could end up with better components, component brands/models/values of your choice, and the wiring schematic of your choice, as well as opening you up to easily swapping in any pickups, and being easily serviceable.
I've never heard of someone wanting to put a PCB harness into a Gibson.