well nobody has ever measured the engine size because it was deemed illegal from a visual. So we never made it that far with it. But the cylinder heads are illegal. They are Pro Stock heads from years gone by that were originally designed for NHRA Pro Stocks but no longer used by Pro Stocks, but are still used by a lot of other drag classes.
The rules call for the heads to have the ports in the stock locations, whether its Chevy Ford or Chrysler. They can be bigger, but basically the port centers need to be in the stock location, or layout. The heads on the 911 are completely different layout than BBC. Nothing fits. Manifold, rocker arms, valve covers, nothing.