I have seen with my on two eyes a 308 whp b-series and it wasn't on pump. I want to say methnol injection or maybe 116 don't know the exact gas but wasn't pump. It was a gsr c1 badage anyway but people like this don't tell there secrets you have to learn by trial and era. I can tell you the compression it was high as hell. But 368whp on a b-series is a stretch for me to believe but not saying it isn't possible cause I have seen some werid things before. But a setup like that will be very, very, very , very , very expensive and time consuming. This is all motor power, but 368 with nitrous is very believe able.