Danny I have the VIN of one road m3 gtr.
I personally doubt the 380bhp of the road one, as it doesn't have restrictors.
I could be wrong but I think the P60B40 is from 450 up to 550 bhp (depending on setup).
Also the only thing in common to the s65 engine is that both are v8
@Mattcslnut : post a pic of the gtr at bmw museum with the bonnet opened pls