TO the OP, I've run both of those intakes. The RPM is far superior. Muscle motors I believe did testing on both and the indy one has major flow issues. I sw this test years after I used the first one. It gave me some tuning assaches and it left power on the table.
The RPm isn't restrictive either. It works well and I would go with one all day over anything but a vitor, which isn't needed in many cases.
All interesting info. Really like the dyno info. I don`t mean to belittle anyone here at all, but I`m going to be "very disappointed" if mine doesn`t go well into the tens. If it doesn`t , I may sell out, and build another big sbc.