i saw that the ctr's are .25 overbore. was wondering if these would fit into a stock b16 block or would the block have to be bored to match the .25 overbore or would it just fit closer in the cylinder walls. looked on cspeedracing.com for compression ratio and with everything oem just with a two layer headgasket these would give you a 11.1 ratio on the b16, also would vavle clearance be a issue? thanks..