Hi Leandro, if what you want is a little more, the same with lowering the cylinder head to upload it the compression relationship from 9.3 to 10 a1, put a silent "empty interior" that for this 1.6cc will become a volume of 3.2 cc; You can change the lift trees for some larger crossing, if it is carburacion and brings the solex 32-34 carburetor, you will not have problems to find emulsion tubes and gasoline gum from different steps to be able to carbure it (if this is not done well, the rest will not serve anything) we will have to put some more "cold" spark plugs, advance the distributor some degrees and change the empty pulmon Low, this is what I would do without complicating more, rectifying an engine from 1.6 to 2000 I do not see the advantage, for that it is easier and more logical to change the engine directly by the 2.0, working on the 1.6 "Lightening masses" is not simple if you do not have a means or make a correct calculation of the material that must be removed in each piece for Number My opinion and of course I do not intend to discourage you, on the contrary, because these kinds of things are what they do to learn more about engines (to do and not do). Greetings and encouragement !!!