what is wrong with the motor in your car now ?? why do a b20 they arent worth doing un less you re-sleve an you might as well just have that gs-r block in your car now sleved to 84.5,dont know why you would want to go mess with the motor you have it is well built(trust me i know) an with a few things to top it off then get in touch with Mr.Selfdistruct an get it tuned an it would be a great daily driver.