Monte,
Out west it's not that bad and I was able to get into T/D in the middle of the bottom half at 7.30 with my B1/MC, at a divisional. National events on the other hand, are another story and I would need to be in the 6.70-6.80 range to make the field. I have nitrous pistons in my 572, and the cam is somewhat NOS friendly. The hemi style 604 is not NOS pistons, and the cam is a 114 LC. I would just like to use maybe a 150-200 plate if that would suffice, and not blow anything up. If it wouldn't be enough anyway, I guess it's back to S/C. The 604 or the 572 should be in the 7.0-7.10 range at sea level N/A.
I can PM you cam specifics or whatever else you need.
Let me know if I am out of my element and should just stay in S/C.