is a 2.0 pinto the same physicle size as the 1.8 pinto and are the carbs in the same place if u can get the with carbs as standard?

same size and all mounting and bolt holes in the same place

straight swap, but does the air filter come through the bonnet?

If so then it's possible that the pierburg carb on your 1.8 would be in a slightly different place to a weber carb meaning you'd have to reshape the hole in the bonnet.