No. not camel hump. Powerpak. They arent real high flowing heads. Good for torque. Hi velocity. I would think thats what a derby car would want. Came off of a newly rebuilt 283. I'd give you that too. I just bought it for the oil pan and the timing gear. Got it all super cheap. Not sure how well they would work with pop-up pistons. Might be to tight in the combustion chamber. Can't get you a number right now. Kinda tucked away.