CYLINDER HEAD ACCESSORY HOLES:

1955 through 1968

Fig. 10.8

 

1968 - Present

Fig. 10.9

  All cylinder heads before 1968 were cast with out accessory holes as shown in Fig. 10.8 then in 1968 some of the heads were cast with the accessory holes and by 1969 all cylinder heads were cast with the accessory holes as shown in Fig. 10.9

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