Add a hobs switch and a vacuum solenoid (or possibly 2 based on no or nc solenoids) to the vacuum canister after tee. Route to wastegates. Add a vacuum solenoid the wastegate control solenoids (or alter wiring) and another hobs switch. A boost gauge under the hood is advisable to adjust the open and close pressure activation on the hobs switches- or long line to move from in car. Likely to work better with port injection and adding second fuel pump... A boost gauge alarm or air/fuel ratio alarm could possibly be converted to activate solenoid. Another safer option could be a/f ratio controlled boost controller which could allow multiple boost levels. For Jb4 auto-tuning, this could possibly allow higher boost