I need to confirm the chassis number 305713 and the engine number 909431 are correct and matching for a paticular 67 911 coupe. Peter Morgan's "Original Porsche 911" identifies for this model year coupe chassis # 305101-307350 should have engine #'s 907001-909000. Seem's that this car's engine number is a little late? I hate to report that the links listed on this site are not helpful. I would also like to know how I go about getting one of those (is that a kardex) letters from Porsche that indicates that particular vehicles history; i.e. VIN #'s, manufactured, delivery, and destination dates, color codes and options. Could any of you guy's shed light on these questions? Thank you.