small block heads questions

Look at a piston that is designed for a zero deck clearance/set up. Hypuer-U's are fine for street and mild racing. The problem here really isnt comp ratio, but head flow to feed the mill. What are the plans?

I ask because ported iron would be OK for a torque monster engine not really reving high or looking to pound out some nice power numbers. Stock X or J heads are a bit on the limiting side.