Flug Werk is using an Allison for the D-9,this if from their website (
http://www.flugwerk.com/diary.shtm ) :
The new powerplant for the FW 190 D-9/N
A specially modified V-1710 Allison V-12 engine has been realized to power Flug Werk’s youngest project, the FW 190 D-9/N “Longnose”. In close cooperation between Flug Werk and our American partner-company “ACE-Allison Competition Engines” / USA. A radical modification was engineered, following the design-changes and criteria given by Flug Werk. The Allison’s propeller shaft and reduction gear-housing were redesigned, to obtain an extension of 300 mm. Design and manufacture of the new assemblies was done under utilisation of the latest state-of-the-art CAD-CAM and CNC processes. The change was necessitated in order to position the liquid-cooled engine’s radiators and oil-cooler between the propeller and the engineblock . At the present the modified powerplant is extensively tested on ACE’s unique teststand. After mounting the engine to the fuselage, a special down-swept exhaust system will be manufactured, with pipes exiting the cowling at the same location as they did on the original Jumo 213 engine.