Right on!
My wife's 72 LeMans has a Pontiac 350 in it too.
I have a OHC6 230 rebuilt into a Sprint in my 66 Tempest, which is why I asked about the Firebird. I think in '69 the OHC6 was still an option, but I am not totally sure on that. If I did not totally adore the GTOs, then I would be a Firebird owner.
You ever see the 1967 concept car the Banshee?
Pretty sure it was built around the OHC6 as well, with V8 options.
Now THAT would have been an eye-grabber !!