I am trying to come up with a plausible date for my engine date stampings on my 64 Impala. I seem to recall they pre-date the finished car by 2-3 months, but I am not positive on that.
On the car's Trim Tag, I have a Body Build Date of:
1=January D=4th week
How much before the actual finished car were the Body Build Dates? Or to put it another way, what should the engine date be in relation to the Body Build Date? Also, would the 327/300 have a partial VIN stamped on the engine's stamp pad? I seem to recall the partial VINs were put on high performance motors by 64.
Not all 327/300's were stamped with the partial VIN, I think it varied by assembly plant. Luckily my Arlington TX built 64 was. Both of my original engine cars are much closer than the 2-3 Month range. Here is my 64's dates for reference.
My 64 327/300 HP was assembled on June 2nd 1964 and my car is a 06D (4th week of June) so my engine pre-dates my car by about 3 weeks.
It was usually 7-10 days between a cast date and the tme the finished machined part was bolted into the assembled car for motors trannies and rear ends. Since most rear ends were made in the East it might be 14 days before a rear end was installed in a CA car.