Hey all, another stupid question from the muppet

. I have a 1.6 cvh injection engine from a mk5 escort witch I am putting in my mk2 fiesta. I am buying twin carbs for this engine. But one thing I am not sure on is, I need a new cam so I thought I would get a performance one, how ever I do not know if I need a injection cam or a carb cam? As I engine is originally injection but will be on carbs?! Or is there no real difference??!!
Cheers all