HI, MIKE - -
I BELIEVE THAT
ALL 427'S HAD THE DATE/CASTING NUMBER LOCATED NEAR THE
OIL FILTER BOSS. THE NUMBER WILL BE A SERIES OF NUMBERS A LETTER AND ANOTHER NUMBER.
THE FIRST NUMBER IS THE DAY OF THE MONTH, THE LETTER REPRESENTS THE MONTH AND THE LAST TWO NUMBERS ARE THE YEAR. THE LETTERS ARE "A" THRU "M" WITH THE EXCEPTION OF "I" - WHICH COULD BE CONFUSED WITH THE NUMBER "1'.
EXAMPLE: MINE IS (AS I RECALL) "4 D 68" WHICH MEANS THAT THE ENGINE BLOCK WAS CAST ON THE 4TH DAY OF APRIL 1968.
THIS NUMBER SHOULD WORK AS FAR AS ESTABLISHING THE YEAR OF YOUR ENGINE FOR THE BUREAUCRACY.
Y'ALL HAVE A REALLY GREAT DAY,
BLACKJACK