462 CID ENGINE BLOCK CASTING NUMBERS:
C6VY-A........1966-68
C6VE-A........1966-68
C6V..............1966-68
462 CYLINDER HEAD CASTING NUMBERS:
C6VE-A....1966-68
C6VE-B.....1966-68
C6VE-D....1966-68
I pulled this from:
www.ford-mel-engine.com The MEL Engine Forum 383, 410, 430, 462 cid • View topic - MEL 462 Engine Specifications
Maybe it will help you out.
EDIT: Also you may find some block numbers on the block somewhere. Also read on the history of this unit and it was a good read.