and 1/3 less cubes than a 360. I cant believe this discussion has gone this far ignoring the exhaust. And are yo sure they are HP manifolds . Pretty rare.
And expensive I've had them for 20 plus years. Just recently had to swap out the pass side for a modified magnum manifold. If you know anyone that is really talented at old cast iron welding I have a couple that need help. Lol
