I was a teenager in the Detroit suburbs in the 70s. I had a friend who's dad was a Pontiac employee (I can't recall what Mr. Poole did there). The father had a 428 Ram Air V and put it into a 69 Firebird and gave it to his son (my buddy) after Dave had 2 minor wrecks and getting in trouble with the Royal Oak PD his Dad took it away from him. That Firebird was wicked fast and was a handful to drive. Throttle steering it was easy, and it was a high revver. It also had manners under 4000 RPM. Above that it acted like a turbo kicked in! It was WAY too much car for a kid- but in those days lots of guys had one off stuff from the big 3 so it wasn't rare to see amazing cars in the tawney suburbs high school parking lots.
I was in a machine shop in Detroit in '78 looking for a special 289 part and the grungy kid working there showed me a 303 CI Ram Air V head. It looked like a FE tunnel Port head but the push rod bosses were cast not steel tubes.
I had no idea I was in the midst of the greatest years of Detroit muscle then. It wasn't until the abortions of 1977 on became the normal turds from Detroit for the next 30 years that I realized just how special those days were. "Too soon old and too late smart"