The arc over the valve covers might be an issue if you raise the port window in the RB, the long horn intakes didn't have a whole lot of valve cover clearence to begin with.

As for standard port window flow (and MW too) the Chaps are tough to beat.

I'm just brainstorming a combo I'd like to try if if were mine. The 470 with an early 230 cold weather '71 casting (they're sill out there) would be a bit more durable in the main webs for all that mega-torque in a pretty big vehicle.

It'll be Awesome any way you do it though