I think I am the only other person who has been on a Dyno Dynamics dyno. FWIW, I dyno'd at 162whp (175whp on a dynojet) IIRC. Your numbers seem very high for that dyno considering they usually are much lower than a dyno jet. Either that or my car really blows, lol.
Now that I think about it, mine may not have been corrected for altitude. Either that or your operator added in some correction factor to change to better numbers, cause usually the DD dynos are known heartbreakers. Do you know if he changed the numbers or not?
Need more info.