I recently installed a VAP crank pulley and tune on a 2018 F Type R. I have an appointment to run the car on a dyno Feb 24th. I want to see where the car is now vs. stock, plus check the timing, AFR and boost pressure as a health check. What do I need to tell the folks at the shop? Does the AWD affect how they should perform the test since the front/rear bias is variable? How do I prevent the car from shifting?