ST is style, 70 is 1970, 68349 is a sedan deville, fwd is the fleetwood plant.
The last number is the sequence number. This is not the same as the VIN. That is at the base of the
drivers side windshield. 14 is Patina silver metallic paint.
05C= built 3rd week of May E= EZ eye (tinted) glass, Y= 6 way power seat, M = power door locks , K= climate control