I found this interesting... 5 Mystery Muscle Motors of the 1960s that Detroit Never Sold in a Car - Gear Heads The Vector engine wasn't listed tho...
Awesome...wonder why they never made it to production (I know they give some explanation, but man - that Olds made SERIOUS power!)?
I'm surprised that the Ford 427 SOHC didn't make the list. Cammer?the real story of the legendary Ford 427 SOHC V8 | Mac's Motor City Garage How cool would it be to have a '60s era Eldorado with that prototype SOHC V12 installed?
Maybe. But title of article didn't mention prototypes, just that they weren't sold in a car. The 427 SOHC was sold for racing, not sold in a car. Plus, the Weslake was raced. So would it be prototype if it was actually raced and not just run on a test stand? Splitting hairs at this point.