Thanks again. We have to network to get things done! He has already contacted Larry and he doesn't have any information on older cars (like 1966). The guy on FBBO has contacted Galen Govier and well get info from him hopefully. Not cheap but worth it. It's a 66 Coronet with a 383 build sheet but a 426 Wedge note on the bottom of the sheet (special order?) and a 426 coded VIN. It is a mystery that needs solved. 426 Wedge in a 66 Coronet?