Back when i was in auto mechanics class in high school 1978 and 79, GM had shipped our class two 4 barrell 400 pontiac engines. They were complete except for carb, dizzy and accessories and were the 557 type blocks. Still had the intakes, valve covers , timing covers and balancers on them. We never got to tear into of them or anything, mainly they were just there to admire as educational. Always wondered why they were, what we all had assumed were blems. Maybe no oil pressure or something like that. Im sure alot of high schools got stuff like that instead of them being scrapped. I bet there still out there in the shop today.
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