About 11 years ago a nice girl and her brother suggested the same thing to me, "don't race without a scantool & boost gauge" Less than a month later I was rebuilding my first 3.8. It will be your best investment. Get a scantool, Boost gauge, adjustable Wastegate actuator & adjustable FP reg and take your time tuning. I would contact Grumpy and see what he has for used stuff.
I sold this car.i now have an 1985 monte ss with a zz4 350.