On the head above the #2 injector, look for the casting number, in the format 603-016-xx-01. The "xx" is the version. #20 were I think the last installed, and #22 is the last replacement head made. That car would originally have had a #17 or later I think, NOT a #14.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC