I've been gone for a while but I'm back with a new question. I'm putting a 59/Custom in my strat with a toggle for a split, wondering which coil is the most output. 59 or Custom and is it the slug or screw coil?
The slug coil is Custom and you should split to that. If you wire it up to split the traditional way (red/white wires tied together and then grounded), it will split to the Custom coil.