Currently spec'ing and setting up to build a B20V. GS-R head and B20Z2 block. I'm doing new pistons, rings, bearings, and rod bolts. I'm having the rods shotpeened and the big ends resized. Fully balanced rotating assembly and stock MLS headgasket. The head is completely stock right now. My current issues is trying to figure out what pistons I need to clear better than stock GS-R cams. I have been recommended to use the Nippon or YCP 84 or 84.25mm 11.5:1 pistons and a mild Skunk2 Tuner 1 cam with springs. Do these pistons have larger intake valve clearances? Has anyone used this setup and what were the results?