I'm also pretty sure that the two cars you thought were a 50s F1 car and a Ferrari were actually a Shelby Cobra and a Shelby Daytona.
The 250 GTO / Daytona is an interesting one. Both of these look very similar.
I think it's the Ferrari, mainly because of the more air holes at the front and the tails. I was going to say 'and they only make 8 Shelby Daytona's', but apparently they only made 36 250 GTOs, so ...
What are they doing racing these museum pieces in the local Sunday drags?
I think you may be right re: the Cobra. I was initially thrown off because it only has a driver half windscreen, but apparently some models of the Cobra actually had this.
The real answer is unlike the Japanese cars, none of these are licensed, so they're just an amalgamation of stuff that kinda looks like another thing.