Originally Posted by GraphiteGhost

Yeah, kinda what I thought. You did say the heads are identical but I remember someone posted way back they had a problem fitting the supercharger on the N/A heads without grinding something down for clearances. I might have misunderstood but the results are the same. I bow to your in-depth knowledge in this regard, as I am but a grasshopper trying to keep away from high speed vehicles windshields on the road to enlightenment!