Weber 34 DATR - Fiat? Lancia? Skoda?

[BenzBoy]

I'm after some info on this carb - twin choke, 34 DATR. It's from a Fiat X1/9 1500. Are they used as an upgrade on anything else? It looks very similar to the carb on my old Skoda Rapid (which was a copy of a Weber of some sort...)
Just wondering what it could possibly be bolted to in order to enhance performance ;D