2fast4ohnevermind

I am thinking about swapping my 1.4 (75hp) engine, for an 1.6 16v (120hp) engine. Now the question is, does anyone here have experience with this or know someone who does? Where should i look out for ? And is it easy or not ?

When i’m shifting my gearbox makes a squeaky sound. Can i solve this with some wd40 ? Or is it something worse ?