most of the performance 6.5s Drew have removed vac pump and regulate boost with a mechanical spring over exhaust Bp to keep Wg closed so vac problems become a thing of past or opt for a non wastegated turbo
Have it flashed as a F, then you don't need no baro, as baro for OBD-II F is taken at startup via the MAP sensor, shared value baro at start & boost after engine is running.