NA you will most likely max out on 93 with something in the 130/L range, without removing the rotating assembly expect gains of maybe 10 max, i mean even with cams the wristpins most likely wont hold into the high rpms needed to make the power.

personally out of need i'd go FI on a gsr engine, but either way NA or FI the GSR engine just makes more sense. like i said, once you even think about upgrading the internals, you've hit a point where you're throwing out exactly what you paid extra for.

it's like getting a cheeseburger that costs 50¢ extra over a hamburger to scrape the cheese off when you get it.