That link you provide, Santaman, is a bit of a bulls extrement.
AC built very similar cars to the Cobra before they were approached by Mr Shelby.
AC Ace and Aceca. The Cobra is a more 'fleshed out' version.
All lovely cars!
I knew Mr Crook quite well. He owned Bristol Cars Ltd. He told me the Bristol 2 liter, as incredible as it was, was just simply a too old design ( in fact, basically a pre war BMW design) and nobody in Europe wanted to sell an engine to those small manufacturers.
They approached RR, Jaguar, MB, BMW.
So they had to go to US.
According to mr Crook, both Ford and GM were happy to sell, but when Bristol tested a few various engines they selected a Chrysler 360 cu/inch engine as the best one. They did some redesigns of it, changes which Chrysler adopted.