I remember in 76 when the "Oldsno-go" 403 showed up in Trans-Ams.Buyers got home ,opened the hood and found a Olds motor.There were "nuclear clouds" over a lot Pontiac dealers.Owners went absolutely apeshit. My current "work car" is a 77 Bonneville with a Olds 403 in it. Runs fine and it's for work-so NBFD. But I found the window sticker in the envelope the PO gave me.Down the bottom is a disclaimer saying engines MIGHT be from another source.GM had been planning this crap years ago completely ignoring the "loyal customer" factor. This is a major reason why they went "tits up".And one of a plethora of reason I despise them.