Any of the sponsors here on HQ will build you a quality motor. Kevin @ hjr builds a nice cub. Titan, redline, k&t... They all do nice work. Just call around and see who you click with on the phone and who is in your price range.
Kevin @ HJR has ported a few sets of cylinders for me and all ran extremely well. He has really fast turnaround time as well. His number is in my signature. Give him a call.
Jared