Turbo timming recommendation?

I'm planning on using a locked out disributor and according to the holley commander 950 wiring diagram the pickup runs through my holly computer then out to my msd 6a box. From what I understand the timing curve and Rev limited will be controlled by the holley box. I hear you on the pump gas I plan to run a conservative tune on the street and load a tune for race gas when playing. I'm very new to all this efi and turbo stuff