Here's an SR block that is in a 68 GTO Convertible. Later casting date number of September 23, 1971, smaller SR number, has the 5 engine mount holes, and drilled for 4-bolt mains with 2-bolt caps.
Did the SR numbers start over every year?
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress.
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