We can set you up with a core also, we have some GM dealer hookups for the GM brand new ones.
But as Phil said, where's the $80 cores (We can save on shipping Phil, and send them all to one place LOL)
2013 ZL1 - 9.82 @ 138MPH (Stock Shortblock)
2011 Camaro SS - 9.87 @ 136MPH (Stock Shortblock)
Installation, Parts, Full Fabrication, EFI Tuning