Ready to mount. The pulley looks to be exactly in the same position it was before removing it. I'm going to say it's within .001". There is some space between it and the S/C case so it's not too critical. I did test fit it and spun it around anyway just to make myself happy. I'm just going to run it & see what happens - keep an eye on it. I'd rather do the electric water pump later so if this gets me a year, or even 6 months, that works