On my build right now i am gonna with a gsr block bored to 84.5mm I'm going to be using Weisco 9.0:1 Pistons with eagle rods ( off ebay for 750 shipped) Type R crank. Moroso Oil pan with pick up and studs. I still have to find out if I'm gonna use a GSR head or a B16. If i was you i would get it sleeved (about 1k) that will make it so that it have all the reliability and strength that you would need/want. It will give u some peace of mind. I need to start a thread of my build soon.. Keep us updated.