@ Shaggy : I'm so glad , and I Completely agree with you , you are correct , and in my opinion all of these Top speed claims are incorrect , but you really don't know from where I get these figures ????? really ??? all right , I tell you , I get all of these and several more from this site , fastestlaps .
I know all of them had 4-speeds and poor cd , Completely know .
But Shaggy look at these :
From Cougar 429 to Torrino Talladega , and Cobra 427 s/c to 1969 Charger 500 and 79 Mustang king cobra 139 hp :
And even this !!!! AC 428 frua , Only few Magazines Road Tested this car , Two British , AutoCar and Motor .... and they tested and get Top speed about :
In 9/1968 Motor get 139.0 mph Top speed .
Auto Car can reach 141.0 mph in july 1968 , and look at this :
I don't know these figures and claims came from where ? which Magazine ? which book or any Documentary facts ..... sorry about this comment Shaggy but this is it .