That is such a pretty torque curve. Just fat and meaty right where you need it most.
160 miles and you strapped it to a dyno? You didn't want to let it break in a bit? I'm betting you'll get a little better numbers once everything loosens up in 1000-2000 miles.
I asked them a couple of times if this was safe and they guaranteed me it was OK. I told them to err on the side of caution because the car only had 160 miles they said they would. This is a very well known and highly respected speed shop, not some fly by night guy with the keys to the dyno.