None of the flow numbers or HP#s matters. What matters is ET and MPH at what weight? As far as conservative, again I've had several of them starting at 470 CI to 572CI. I know what mine were capable of. I had a 1870# dragster with B1/MC's that went 7.25@183. I'm going to bet it made around 1070-1080 HP. The more HP you make, the converter you use is paramount to your success in using it properly. JMO Ask Al about his 525 CI B1/MC.