For those of you who are interested here's a mockup template or basic design I can give to a luthier that I made from blueprints and schematic of Jazzys, Strats and Stangs. By using the neck pocket as a counter point I've been able to put everything to a pretty accurate scale...

*Mustang body, electronics and scratchplate
*Jazzmaster bridge and tremolo
*Stratocaster neck and pickups (positioned exactly as a strat)
All of this is at a 25.5" scale length and more or less correct of where everthing will be positioned.
One problem I can forsee is whether the tremolo will overlap the arm contour. Any guesstimates?