No, Joe, please read the titel, he wants to use the S6PLUS-heads on an old ABH-block (D11 V8, C4 S6/S4 4,2).
The problem is, that I have now idear if it fits or not. The problem is, that the ABH-engine is a complete diffrent generation. Even if the modern heads fits to the old block, you need some more parts like the modern CPU and the "Schaltsaugrohr". The "Schaltsaugrohr" is the part inbetween of the heads for the airintake.
Maybe you should ask at www.audiV8.com
, at that board the most people drive the old D11, it could be, that one of those guys allready tried it out...