the strat i built (using USACG body/neck) was based partly on the EJ model, partly on the SRV model, partly on my own specs....
the 12" radius is key.
with the EJ and SRV, the pau ferro fretboard is key....
and with a tiltback headstock, and a graphite nut, i didn't feel the need for a LSR type nut..
but i've played the American Deluxe, which is half the cost of the JB, and feels just as nice.
it has the LSR, and works well.
if you have a favorite strat now, why not just buy an LSR and have a luthier put it on and set up your strat?
custom pickups are easy,
these sound better than ANY fender pickups i've heard:
http://wildepickups.com/Wilde_Bill_s_MicroCoils.html and so much cheaper......