VIN : 20867S109342
Engine stamp : 2109342 F0362RE
Head : 3782461
Generator : 1102268 2D 4
Radiator : D62
Transmission : T10-7D
Expansion Tank : 63M
I'm no expert on numbers, just using guides...
The serial 109342 would have been built in early April, probably end of week 1 or start of week 2.
F0362RE stamp doesn't seem quite right to me; my understanding is that the "F" should be followed by a 2 digit month (ie, "01" to "12") plus a 2-digit day code (ie, "01" to "31"), then the "RE", which stands for a 340hp 327 with manual trans, solid lifter cam, and a Rochester 4 barrel. Could it read "F0302RE" rather than "F0362RE"?
You might check the foundry date atop the block's bellhousing collar on the passenger side, and the casting number on the driver side, for further verification.
Head part number is correct.
Generator is correct part number, and date (April 4). Same for the radiator (April of 62).
The tranny stamp doesn't conform to the format in my guide (which says month code shpuld precede day code), but "may" indicate an April 7th date, which is consistent with your car.
Radiator Expansion tank date appears to be December 1963, so it is a replacement.