Im gonna be using a Turbo XS manual boost controller, the one that has high and low boost settings. Since it requires 12V to the solenoids when i hit the switch for high boost iw as thinking ic an also hook the wire from the solenoid to my MSD digital six which has a retard feature. When this wire on the MSD see's 12v it will retard the timing to whatever i set it at. So when i hit the switch for high boost, 12v would go to the solenoid and msd wire and whem im not on high boost i will still have good power due to not too much retarding. How does this sound to you guys?

How many degrees should my timing be retarded from stock for 6.5psi from a rev hard 2c kit? and at 9psi? thanks