Thanks again, mean while I'm trying to find out more about the new engines previous life, this info would probably tell me a lot. New to the Mini world and already enjoying the mechanical side. The engine swap has gone smooth and for the most part easy. At idle and short run time, the new engine sounds great. Shopping for a new pulley as of now. Thanks again for your time.

Yes, based on the information you provided, that is my best estimation for a solution on your engine swap, without inspecting the car in person....

Ken

Thank you for the reply. Weird that they would change an internal engine part for an automatic, instead of changing just the pulley, engineering must had a reason to do so. Ok, so in order to make this work, I would need the pulley for an automatic engine correct ? Or is it more serious than that. 
Ron

It sounds like you may have purchased an engine for the automatic and you have a manual MINI, or visa versa.  The crankshafts are different for manual vs automatic and the crank pulley is not interchangeable between the two types. 

Ken

Hello, new on this forum here and mini's. I recently purchased a 2008 Mini Cooper S convertible with a blown engine at a good price. I was able to buy another supercharged engine with low miles and so the process of swapping engines, I ran into a problem. Everything swapped over just fine until I get to the crankshaft dampener. It appears that the crankshaft diameter on the old engine is smaller and therefore the dampener will not fit on the new engine. This is why I came here to consult with other Mini owners that may have ran into this issue. Everyone I talk to loves their Mini and talks like it is a fun car to drive. I would love to get this problem resolved so I too can enjoy the ride. Any help would be appreciated.
Ron