I've looked and haven't found an exact answer to this. I'm finishing up putting the motor back together so I can drop it in the car. I have an ls3 crate motor that has the C6 dampener on it, I ofcourse have the LS1 water pump for clearance issues, the donor car was an 04 LS1 so the rest of the components are are also LS1, alternator, compressor etc. Does anyone foresee an issue with the pulleys lining up properly? Thanks for any help!