On 13 10/15/07, Bill wrote: > > Ultimately, I'm going for is there ANY to tell if this is the original > motor or not? within a somewhat wide tolerance of accuracy, yes. check your fender tag for the scheduled production date. under "SO NUMBER" is a 3 digit number, first digit/character is month,, 1=Jan,9=Sept,A=Oct,C=Dec.,, 8-A months are 1964, 1-7 are 1965. second 2 digits are the day, , so C21 is Dec 21, 1965. Gary is after your block assembly date code (I suspect), thats when the engine was assembled.., usually 7-45 days prior to the Sch.Prod.dAte,,, then check casting date of block,, thats usually 7-45 days prior to the assembly date of engine... ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.