Scott called tonight. Informed me there is a bigger head than the stage v replacement (not the millenium) that might be better for my combo. It has a much bigger intake valve, 2.40 vs the 2.25 in the replacement head. Also he thinks a cast iron Callies block would be a better foundation for a street/strip hemi. What do you guys think, cast iron Callies block or aluminum Bill Mitchell block would make a better street block and why?