1968 Casting Numbers

Engine HP Block Heads Intake Exhaust (left) Exhaust (right)
302 290 3914678 3917291 3917610 3892683 A.I.R. 3872730 A.I.R.
        3941126 (2×4 bottom)    
        3941130 (2×4 top)    
327 210 3914660 (rare) 3917293 3919801 3892683 A.I.R. 3840912 A/T
    3914678 (most)     3892679 A/T 3872730 A.I.R.
327 275 3914660 (rare) 3917291 3919803 3892683 A.I.R. 3840912 A/T
    3914678 (most)     3892679 A/T 3872730 A.I.R.
350 295 3914678 3917291 3919803 3892683 A.I.R. 3840912 A/T
      3947041   3892679 A/T 3872730 A.I.R.
396 325 3916323 (early) 3917215 3883948 3909879 3916178
    3935440 (late)        
396 350 3916323 (early) 3917215 3883948 3909879 3916178
    3935440 (late)        
396 375 3916323 (early) 3919838 3885069 (early) 3909879 3916178
    3935440 (late) 3919840 3933163 (late)    
      3919842 (L89)      

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