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Trust me on this one, they were in the mix if you know what I mean.

I don't think it was much of a secret even back then by guys who knew what was going on. My friend's speed shop always had the latest info(it seemed) on big-block Chevy headwork & somehow always had one customer who had Pontiac RamAir engines availible to him. My guess is this guy worked for GM or had a relative who did.