Thanks!
Yup, that info is critical for best performance.
We showed up last year at an event at Bandimere in Colorado to run against trucks all over North America.
When the smoke cleared, we were ready for the 11,000' DA that was present (103deg F at ~5500' and humid) and they weren't. Half the entries couldn't even spool their turbos, so we went home with the hardware. Turbo selection and tuning must be changed based on DA for our application.