Well let’s just say I could give them a good test platform. I have my old 440-1 Indy heads sitting at 370cfm and I started updating them for 2.225 valves and threw them on my shelf. I have one or two Indy intakes but no others. I quit at 420 on my B1 heads that are sitting on my 572 as I thought I was in a hurry to get that car out. Yaaaa right.