I like my crane stuff... I don't have it for supercharger though. And I am pretty sure you have to buy the timing retard as an extra piece to the crane box.
I have the same setup, using it with my procharger p600b. I beleive there is newer msd options out there, the msd digital 7 has boost retard built in, check it out. Also i think the digital 6 has some kind of retard also.