Do you mean the L71? If so, that was a 435hp, tri-carb, solid lifter 427. Now there was also a ZL1 in 69 which was an ALL aluninum 427, installed in 69 1969 Cameros, and 2 Corvettes in 1969. But I never heard of an LS1 427. Also, in 69 the other 427s were L36-390hp hydraulic, L68-400hp hydraulic tri-carb, L88-430hp solid, aluminum head, 1 850 Holley. And last of there was an L89 aluminum head option for the L71. Was the L78-425hp an option in 1969? The LS4, 5 and 6 were 454 options.
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