[SuperCars]

Okay, leave the 70 455HO with it's smaller D-port heads out of the question of this thread. Compare the 70 400RAIV with round port heads, and 71 455HO with round port heads. I notice the factory rating on each as: 70 400RAIV 370HP/5500RPM versus 71 455HO 335HP/4400RPM. Would it be true that the 71 HP is peaked out at 4400RPM. That's at 1100RPM under the RAIV rating, which seems to be very low RPM to rate its maximum HP. That is how the L88's were rated less than L71's in the Vettes.