Bob, I hand carry my wheels and tires to my local Discount and speak to the tech who will do the work. They are not high school kids here. Talk to the store manager first if you like. Show him your brand new rims and how they have no marks on them
Ask for their best balance job and allow them to put self adhesive weights on the outside and inside of the wheel if necessary. Tell them it is a race car and you are going to drive it up to 130 mph on the track occasionally
The tough thing about GY Billboards is that if you get a nail hole, DT will not repair them. They claim that they can't plug a bias ply tire and they don't do inside patches anymore. Lawyers got to them, I think. I don't know if this is a nationwide thing.
There is a DT on 121 @ Ohio in Plano that is managed by an SCCA racer that we use up here in the far north. His name is Todd Eaddy. I take my race car tires to him personally.
Alternatively, you might talk to your nearest Smiley's Racing shop. Call first.
Sam