I was hoping a Luthier would provide this kind of service because I have heard that pick-up placement is a fine art. Scale length I can pretty much do on me tod, but I wouldn't know where would be best to place the all-important pups.
lol, scale length and fret placement is precise mathematics - pickup placement is not a fine art
in classic guitar design pickup placement has almost always been determined mostly by structural reasons... dont weaken the neck or bridge areas!!
for the bridge just make sure its not too close - i like the closest poles to be between 1"+ away from the saddle
For the neck pickup 24th fret location definitely works well, but generally as close to the neck without weakening the join is good and gives a nice contrast from the bridge.
some will tell you they
need to be on node points to sound good - i dont agree, but it certainly wont sound bad for being on a node point either
if in doubt - follow what works on a guitar you like.