Actually the 1600 cams from 105 series are better cams than any of the USA 2 liter.
There`s little difference in lift (9.5 vs 9.6mm)
Only the Euro 10548 cam is better, and you would be advised to only chance out the intake cam for a 10548-01 cam.
Otherwise with 2 10548-01 cams you will have excessive overlap and reduced performance.
If you have the 101 1600 Veloce cams you have far better cams than any 2 liter USA version cam. Again I suggest you only use the intake cam if you change to a 10548-01 cam.
Why do you want to swap your 1600 engine camshafts for a 2.0 camshafts? Are your 1.6L cams worn, and you have a good set of 2L's lying around? Did you believe that 2L cams gave greater performance? (Alfar7's post above addresses this one).
Pretty much all Nord Alfa cams will physically interchange; e.g., cams from 1.3, 1.6, 1.8 and 2.0 engines all have the same basic dimensions. But the profile of the lobes varies. In general, later cams produce less performance as emission factors influenced their design.
Note that anytime you change cams, even 1.6 --> 1.6, you need to change the adjusting shims on each valve.
Thank you for your response , yes i was under the impression that the 2000 camshaft would increase hp on the 1600 engine , but i guess ill leave that engine as is , i am going to rebuild my 2000 engine for performance