Those big-block Olds engines were well and truly hosses.
Used to be, GM's divisions had inter-division rivalry, motivated to engineer creative and better solutions, and that gave best of all worlds - resources of the world's largest and best-equipped auto manufacturer, but a competitive spark between 'em. It worked well.
Then, platform engineering, "GM Powerplant Group," and the vehicles became largely indistinguishable from each other. It is telling that, despite being a tiny operation in the global scheme of things, GMH (Holden) has been able to design and build some very innovative and well-conceived product.
GM still builds good product, but as long as they deprive the car people the freedom to innovate and (more importantly) follow up with production, they'll sag.
Love my Cadillacs, still.