1993Impreza

if i were to get the EJ22 engine to do the swap what would be the best model and year to look for to make the swap go easiest or doesn't it matter? also i just noticed when i open my gas cap air like rushes out, kinda like when u open a pop can, it sounds like it gets vaccumed or something? is that normal?

would the swap be hard or could much go wrong with it?

its a auto, so the swap wouldn't be hard?? thanks for that bit of advice i'll definantly take that into thought

I was thinking of some ways to give my very slow 1993 1.8L impreza some kick. and i was thinking of an intake but i dont know what kind to get and what would fit it, so if any one has any suggestions that would be great, and also if anyone knows of anything else i can do to give it some more kick please tell me.