Those (3125 to 3158) are the fenders in question. AC must have still had the bucks for those and decided to use them for the COX / COB cars, since they were fitted with such narrow wheels and tires. Do you know the dimensional difference between those and the later 427 street fender?
Good question, to which I have not a clue of the answer. They are so rare and so rarely sell (COX is still in the hands of the original owner and his son) that I don't know what it would take to buy one.
Jim,
Just a small edit. I'm sure you wanted to type 6126 after COX in your post.
These were only made from 3125 to 3158. The narrow fenders were supposedly to improve the look with narrower wheels but they reintroduced the wide rear fenders after only those few. Customer demand sells or doesn't sell cars!
Good question, to which I have not a clue of the answer. They are so rare and so rarely sell that I don't know what it would take to buy one.
As far as left hand drive, they are extremely rare. There were only 7 produced in LHD. Several of those have been altered to 427's. So buying one of the remaining 289's would be difficult to say the least.
I think it is a sweet shape and you're headed in the right direction. I can only guess at the width and I'm thinking that the track(tread) is 2" less on a street car, 1" per side. The rear wheels are 2" narrower on street cars. That is 3" per side! Having said that I'd have to look up the wheel offsets also and see how that plays into my 'cipherin. A Snake I'm just going by Rinsey Mills numbers from Essential AC Cobra. The big book however says that 3127 was the fourth prototype street 427. Funnily enough it looks like about 3/4 of the narrow hips have had some steroids to accomodate the 9.5's making the narrow hip all the more rare and to some more desirable. They're harder to find than an original unSCised street car!!