is there really anything special about this motor in a 64 GTO?
I believe the 64 block had an engine unit (identification) number that was different from the VIN. So "numbers matching" really isn't for the early GTOs. And the W code = 4 speed, X means both automatic and manual flywheels can be mounted.Thanks. Is this the case even if it is not the original block from the car. Also why the xw?