can ANYONE tell me the year of this machine? code 4150    serial#a-408 360  its a red face 200  and the first and only owner bought it brand new from the dealer in 72 but these numbers tell me other wise. everythings in prestine condition just preserved,once i know when it was born i can start rebuilding top to bottom. i want to take my time and do this rebuild by the books.a couple years ago i regapped,retimed and rebuilt a mag, motor, and carb . im not a mechanic but i was walked through it on this forum . any input would be utilized and appreciated.  thanks for the inside knowledge  louieRD