Never heard of a 65-70 GTO or Firebird with anything other than a Pontiac mill. All the reference material for the GTO and Firebird that I have make no mention of non corporate engines anywhere.
I did see a later GTO with a Chevy or Olds motor, built in Canada. That was a long time ago, and the specifics escape me.
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1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.
