Most everyone gets to caught up in cubic inches kinda funny actually.
At our local track a few years back a 1952 chevy pickup was there. He was running a straight 6 with some kind of mechanical Hilborn injection. Running 7.5-7.8 1/8 times all motor no nos. Now granted he had more than 3000 just into the injection setup I would suspect. He was flat out embarrassing alot of v-8 cars with $10,000 motors. Pulling the wheels of the ground a few inches when it left like it was shot out of a cannon. Any guesses o. What he was making for horse power? I can tell you his chassis efficiency was excellent!!