Not Ranked
Just a question, but why go with the nice 4.125" bore and larger port heads if you're only trying to make 450hp?
I built a 408 with AFR 205heads and 4.030" bore that made 570hp@6300 with a 242/250 .576/.577 hydraulic roller.
If you're only shooting for 450hp, you'd want something around 220* duration cam with .550" lift...but the small cam would run out of breath (figure hp peak around 5300rpm) right around those nice heads really start to work.
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