To the best of my knowledge, everything on this 360 is stock, as if you pulled a stock 360 4bbl out of a maxi van, just remanufactured. Instead of a TQ/Cast intake, it has a Holley/Eddy RPM intake. My cam is really close on lift to a stock 360 4bbl, but a little smaller on duration. That is the best I can tell. I've had the oil pan and intake off. I've looked in the spark plug holes and saw the dished pistons.