Those are good numbers for a '62 motor.
8I8007853 = VIN of the original car the motor came from
8 = Electra 225 series
I = 1962 model year
8 = built in Arlington, TX plant
007853 = car serial number starting at 001001
4I168090 = engine production code number
4I = 1962 standard compression, 4 barrel 401
168090 = engine serial number
JCE = unknown