I agree with Therm, even though I sold my GSR motor to build a b20vtec, don't mind that part
With the GSR, you'll still get to choose your compression because it's not neccessarily low enough for boost yet not high enough for a naturally aspirated set up. I still shine to think that this Non VTEC to VTEC plus TURBO doesn't seem to be the best idea. I can say that building my B20vtec with reliability took a nice chunk out of my bank account. Aren't GSR sleeves stronger, anyway?