I was up at the machine shop trying to get my sr20det checked out due to a spun bearing. I left it with them but then they couldnt find the specs on it for the clearences on the crank ect. I told them to just go by an infiniti g20 sr20de are the two motors the same just a difference in compression by the shape of the piston?

Should be the same. Uses a different piston but all the clearances should be the same.