mine look about like that. sweetness.

Have you tought about using bigger intake valves? I think the 85-86 engines have smaller valves than the S4 motors, despite the fact that bore and stroke is the same.

35 and 32 mm for intake exhaust on a 85-86 head compared to 37 and 33 for a S4 head. I could guess that this mode would make the engine perform better, since 85-86 engines have cam profiles similar to GT cams.

im doing a hybrid build. a 5L block with Euro 16v heads.

hybrid build
 

Is there any one use 4.7L (85 ROW) block with S4 32V heads?

not sure why you would do that. the reason most people do a hybrid (so i have been told) is to have a larger displacement, with much less complicated valve train.