For an all out drag racing application you would start with a set of raw castings that you would send to someone like CFE or Slawko (I know these two companies have done development on these heads)
They are a very good, well engineered engine that can perform well. I do think that a oval track head with a drag racing specific camshaft could also run a decent number also. You won't be running anything under 6500-7000 in stall speed, in an all out application is it going to be closer to 8500-9000.
An all out engine is going to cost plenty of $$$, you're not going to get any change out of $60-80K