The Corvette LS1 requires frame notching for the a/c unless you mount it high on the passenger side using Street and Performance's mounts. The Corvette LT1 will require new A/C lines since the compressor is on the driver side and has a bastard fitting for the lines. The LS1 drops right in without any problems, just need motor mount adapters such as the ones they sell at Street and Performance. www.hotrodlane.cc