Thanks all for the answers,
I'm from Mexico....and so my car..... and as you probably know, "mexican" Mustangs can not be decoded by their door tags...I mean, you can not tell where and when the car was built....or can you???
I'm guessing my built date should be on the frame of Oct 64 - Feb 65...as for some part numbers that are stamped on different parts of my car.... for example, some of the panels like the fenders have stamped "10 13 3", deck panel has "11 5 2C", others like the hood hinges says "2 27 3", the battery holddown clamp says "10 14 4", the rear axle vin tag reads "WCZ-F 3.00 4LD 901".....and for this, I know that 901 is the code for the plant, in this case Dearborn. The original CARbureTER fuel pump is stamped with the numbers "30 M 4A".
Original invoice is from April, 1965.
Thank you
Luis