[Prowbar]

Thanks for the reply, James. Time to rework the intake... Seems you gained some hp and torque performing those modifications.

Hope you get around to performing the dyno testing, would be interesting to see. A dual exhaust would also help in your case I would think.

I did the same as you to the 478 heads. The short side was a sharp ledge going transitioning into the valve seat area. I radiused it. Also added the 3 angles.

I like your idea, but how much do you need to take off of the deck to get rid of the dome in the piston? The offset grind sounds good but a lot of work. Then you run into the intake manifold and water cross-over fitment problems...