No, the original (AFAIK) split was that the 289 block was sent to two assembly plants, Cleveland, or Windsor. The "Cleveland Injun" was the hot model, with mechanical lifters and a 4-bbl carb, pumping out significantly more hp than the plain 289-2bbl with hydraulic lifters from the Windsor plant. I can get to the manuals
this week, but if you nag me next week I can tell you which engines/years shipped. By '71 or '72 the cars were getting awfully big and fat and the big engines were in the 428/429 class. I learned to drive stick on one of those, and was warned up front that the light on the dashboard and the buzzer in the car were there to make Real Damn Sure you knew you had shifted into reverse--not first. Drop the clutch
in reverse, and you could do real damage to whatever used to be behind you. Miss the 2-3 shift, and the stick allegedly could break your wrist if you were gripping it--instead of palming it.
But hey, those big engines could sure tow a boat. (Nautical segway.<G>) That's why diesel
engines don't trust me, and I don't mind gasoline. I know how to deal with it!