There are a few reputable builders and most are listed on here.
Janis can definitely do it, but $900 is probably a stock rebuild without any billet parts.
You will need a forward drum and servo minimum at 500 HP.
I'm also in TX, but I'm in North Texas, about an hr away from Dallas or Ft. Worth.
Chris at CKPerformance can take care of you also.
Where are you at, and maybe we can recommend someone closer.