A Holley 350 2bbl is a bolt on and will give good performance. Well, I say bolt on, but that is if you lose the EGR plate, so if you have smog checks for inspection that's out. Otherwise the 350 is a good choice. There is another post on here where someone is wanting to put a 500 on a 2.0 and I think we are all in agreement that is way too much carb. Same holds true for the 2.3.