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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies
Hi guys.... Recently took the motor out of my77442and here is what I've found so far. Block Id in front above water pump 381917 with a large 1 after it. after taking the tranny apart i see a F5 on the back. Also on the head in the back driver side is W123605