Just switched from a Victor single plane back to a RPM Air-Gap and low end performance picked right up. I'm running a 700cfm Holley on my 360 but would recommend a 750 minimum for your stroker.

I think that the cam is going to be real mild with the added cubes. I'd be looking more to the .510 to .550 range if it were mine and had the valve to piston clearance. Then have to consider new springs possibly.