340 tag on block

My Challenger has a SPD of A13 (Oct 13th)
Engine was cast Oct 14th
Engine Assembled date 10-29
Intake Cast 10-21
Exhaust Manifolds 10-18 & 10-21
3rd Member Assembled date 10-27
Rear Axle Assembled date 10-28
Original Door Sticker 10-69
If it hadn't gotten built till November that would have shown 11-69