How much power from intake swap?

God that looks horrible to me Mike! The hump/turtle may help a little, but I'd be thrilled to just break even with that setup. I hope you have some time allocated for tuning while on the pump?

My opinion, I honestly think you'll have to load that carb so heavy to make any power, the BSFC will end up way out of wack. Good thing it's a large carb, as anything smaller with a low end signal would probably bounce the mixture all over the place trying to get to the outer cylinders.

Watch you prove me completely wrong...:D

How bout a 2"/3" machined/fabbed "plenum" installed between the top and bottom? :)