It varies I'm afraid matey.
He has alot of them custom wound by DiMarzio. And it depends on what Strat he uses. But on his 1976 black strat he uses a Fast Track 1 in the neck, and middle, and then a
Super Distortion or
PAF Pro in the bridge.
So on your Squier 51 your getting, I'd go with a Fast Track 1 in the neck, and then a Super Distortion OR a PAF Pro in the bridge.
He also liked a HS-2 for a single coil sound too, so that may be another possiblity along with the Fast Track 1.
- - - - -
Sounds like a nice project too.
I've been wanting one of those Squier 51's for a while now.