Sorry I can't help with your question. But I have a question for you: What year is your 302 GMC? I have read/heard reports of 302's in trucks and school buses as late as 64. Military maybe even later. I thought for years that GMC dropped the inline 6's when they debuted their new V6 in 60. I know they starting offering the Chevy 230/250 inline 6 as a lower cost option in pickups in 65-66. Do you know anything about that? Thanks. smile


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