Hey Bluebird, I used Calvert Racing engines in Denton for the rebuild on my 455HO motor. I was mostly pleased with him, though there were a couple of small details on the engine that I felt like one of his guys could have been more careful. If you are looking to rebuild it, I'd consider Calvert, or Jim Robertson (same name on PY) on the PY boards, he is in Abilene. Also Len Williams in Tulsa is the closest Pontiac specialist to our area. If you are just needing to have it tuned up or analyzed, I'd call Carr's Corvettes in Plano(
www.carrscorvettesandcustoms.com) as I've heard great things about them. Also might ask the folks at DAPA in Dallas (dapa.org) as they have a lot of contacts they recommend in the area for our cars. Hope that helps, Rick Smith