From wikipedia.org/wiki/AC_Cobras :
How the english AC roadster became a COBRA :
......" Like many British manufacturers, AC Cars had been using the Bristol straight-6 engine in its small-volume production, including its AC Ace two-seater roadster. This had a hand-built body with a steel tube frame, and aluminium body panels that were made using English wheeling machines. The engine was a pre-World War II design by BMW which by the 1960s was considered dated. Bristol decided in 1961 to cease production of its engine and instead to use Chrysler 313 cu in (5.1 L) V8 engines. AC started using the 2.6 litre Ford Zephyr engine in its cars.
In September 1961, American automotive designer Carroll Shelby wrote to AC asking if they would build him a car modified to accept a V8 engine. AC agreed, provided a suitable engine could be found. Shelby went to Chevrolet to see if they would provide him with engines, but not wanting to add competition to the Corvette they said no. However, Ford wanted a car that could compete with the Corvette and they happened to have a brand new engine which could be used in this endeavor: the Windsor 221 in³ (3.6 L) engine – a new lightweight, thin-wall cast small-block V8. Ford provided Shelby with two engines.".......
The AC Roadster continuation in england :
......" By 1982, the Ac name was licensed by Autokraft, a Cobra parts reseller and replica car manufacturing company owned by Brian A. Angliss. Autokraft also had acquired the company's tooling.
Autokraft manufactured an AC 289 continuation car called the Autokraft Mk IV, basically a Mk III with a 302 cubic inches (4.95 L) Ford V8 and Borg Warner T5 Transmission. The Mk IV also received an independent suspension.
In 1986, Autokraft (as a joint venture with Ford joining in 1987) purchased AC Cars, and produced the AC Mk IV Cobra, with a 250 hp (186 kW) at 4,200 rpm, 4,942 cc Ford V8, which provided a top speed of 215 km/h (134 mph) and 0–100 km/h in 5.2 seconds.
At the 1990 Geneva Salon the Lightweight version was presented: weight was down to 1,070 kg (2,360 lb) (compared to 1,190 kg or 2,620 lb) and power was up to 370 hp (276 kW) at 5,750 rpm thanks to alloy heads, a Holley four-barrel carburettor, and no catalytic converter. While the Lightweight did not meet US federal regulations, the Mk IV did, and 480 cars of all versions were built until 1996."....
DAX and the AC 427 Cobra replika :
DJ Sportscars International Ltd. was founded in 1968 and based in Harlow,Essex, England. They started as a fibreglass moulding company. In 1985 John Tojeiro, the original Designer of the AC ACE chassis became a director of the company. They were the first British company to make a kit based replica of the AC 427 Cobra. They called it the DAX Tojeiro.
The family of Brian Johns stood behind this and continued the business until 2017. Peter Walker worked until 2012 as a devellopement engineer with DAX and improved the chassis of the DAX Cobra.
The belgium DAX dealer John Kox took over the DAX 427 production at the former adress in North weald, Essex. The important well trained DAX employees are still there and they operate under the new management and company name JK-Sportscars Ltd. The Products Dax Tojeiro 427 IRS and Dax Tojeiro 427 De Dion are produced from this company. see : www.jk-sportscars.co.uk