oldman9

I'm almost done getting everything together to complete my spare engine.
I currently have.
Rebuilt D15 bottom end
A6 head and camshaft
AEM adjustable cam gear
I also got most of the A6 intake manifold
I think the runners are a bit better than the B7 intake I have in my car, but I was not sure what all would need to be done to run it or if its even worth it.
The MAP sensor looks to be the worst thing to rig up. Not sure if the B7 injectors and rail will fit either.
Doing a test fit with the head after I got it home. Its dirty... (I also decided I hate the block paint color)

TomCat39

I believe the A6 throttle body and the B7 throttle body are the same size opening. So I think the map won't be an issue if you have the throttle body mounted map on the B7. Just use the B7 TB.

I believe the areas you may see a challenge with is the IAT sensor that is normally on the back of runner 3 I think and what you mentioned of fuel rail fitment.

You may just wish to use the Z6 IM as it's going to be 100% compatible and I suspect the runners are very much the same between the two. By the looks, the plenum doesn't look to different over the Z6 either.