Re: EMG 89 vs 89R
When I wrote single coil sound, I referred to the EMG-89 and/or 89R in its SA mode. This is when it is supposed to sound like a Fender single coil pickup.
If, by "single coil sound", you actually meant the sound obtained from two single coil pickups connected in parallel and electrically in phase, the critical detail is the physical distance between the two coils.
In a typical Stratocaster-style guitar, the distance between two coils is approximately 21/4 inches (57mm). On a 24 fret guitar HH guitar, the distance between the two inner coils will be approximately 25/8 inches (66mm). Thus, your best bet might actually be to fit an EMG-89R as your bridge PU and the regular -89 as the neck PU.