Google ITR vs GSR cams dyno on boost. Look at other peoples dynos from just changing cams. Tons of power. Another thing is some all motor cams make more power than turbo cams. The skunk2 pro1's are great all motor cams but even better turbo cams. The best thing you can do is ask the person who's going to tune your car which they think will make more power. The turbo you have might blow hot air into the cylinders at higher rpms where the itr cams make power. But imo if you have both sell the gsrs for another upgrade you can do.

But just being .20 over isn't it still like a 1.8 still? I know 84mm is a 2.0 but you need to sleeve to go that far. That's what my LSV is at least. Maybe I'm just missunderstanding it. I suck at math anyways..

Alright lmk when you figure it out. No matter what though you're gonna make good power.