So, who's got an ee-tee-kay-ay?

[Conover]

These might help with visual identifications.

http://www.techtonicstuning.com/cams.html

http://www.scientificrabbit.com/node/24

http://www.scirocco.org/tech/mk2/5000tb/5000tb.html

That's all good info there, after removing the TB you should be able to tell if the intake has been modified, or even easier if they used the FOX intake. Also measure the secondary throttle plate, easy.