Patches, you are only going to be at convergence range for a split second. There is no way you can close on a target at 400+ mph, and rake both wings and the cockpit all at convergence. For most of that "rake" you are either outside or inside your covergence setting.
Instead of "raking" the plane, concentrate on the wing root and engine. Wing root you will likely take off a wing, concentrate on 1 engine and get flames, that engine will eventually explode and take the wing off with it.
My regular MA ride is the F-4U1 or F-4U1D, and I've killed plenty of buffs with those 6x.50's.