To be honest, have the sleeving company do the build on the bottom end if you are after HIGH HP.(thats if you are sleeving it) They have all the precision measuring tools to make the clearance dead on versus using plastigage on bearings like most people do. OF course, more $$$ I am about to do a K-series 500HP RSX build for a customer and I am letting Laskey Racing ( Benson sleeves ) do the sleeves and bottom end assembly.