Re: 1970 vs 1971 LS-6
1970 LS.1 rated @ 450 H.P. had 11.25:1 compression ratio. Mechanical lifter cam, and an 800 CFM Holley, rectangular port cast iron heads, forged pistons and four bolt caps.
1971 LS:6 rated @ 425 H.P. dropped the compression ratio to 9:1.
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