1st off WISE choice..please keep in mind that a dyno's primary purpose is to fine tune,breakin etc..many people get it confused with trying to see how much HP the mule can make..WRONG !.
after your dyno session and you take your motor home ..most likley it will sit for a few weeks to months before restarted..JUST MAKE SURE TO RE-PRIME THE MOTOR again before starting even though its been dynoed already..
i am sure someone will come along and drop you a name..do a little research and speak to the owner of the dyno and get his take on what should be accomplished on a dyno...
.....oh yeah down south..depending how long your motor is on the dyno you can expect $400 to $600 (high end)...for the cost.
time is money on the dyno.
good luck
Brian