They are rated at 1183CFM at 28” of. The 03 Cobra twin 57mm is rated at 1089 at 28”. You could probably get rough estimate on draw through supercharger system. Your probably better off seeing before and after on similar builds. Too many variables to see what kind of restriction you would have. I would think you would be fine around 600 whp on draw through system just based what I’ve seen on Cobras. Still that is just guessing. What have you guys seen on 5.0s with the stock Tb power wise on which supercharger?