Not Ranked
Deck height changed in the early 70's and again in the 80's as compression ratio fell. The deck on 68-70 blocks is 10.3", 70 1/2
is 10.310 and 72 and up 10.322 inches. Combustion chambers also grew, 68-71 have 75.8cc, 72-74 are 91.4 cc and 75 up 96.2 cc. Compression ratios equalled 10.5, 8.5 and 8.0 respectively.
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"I think we have more machinery of government than is necessary, too many parasites living on the labor of the industrious." Thomas Jefferson
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