VIN numbers would be in two locations: chassis plate found on the top of the right hand foot box or on the motor mount tower. Most likely the motor mount towers were cut off to create a new means of attachment for the 260 engine. This was quite common for individuals swaping engines into Aces. Without the towers, the car could not be identified as AC or Bristol engine (assuming the chassis plate was also missing). A number of people tried registering Aces with missing paperwork and no VIN numbers and failed. Had to be assigned a new state issued VIN number.
