In 1998 JD Classics were commissioned to build the ultimate XK150 FHC for Road/Rally use. This was a no expense spared, chassis off restoration to customer specification.

The build commenced with a genuine UK RHD 3.8 Litre S FHC, which importantly retained its original S specification engine. The high specification JD Classics build incorporated a Wide Angle 'D' Type Jaguar Cylinder Head with DC03 Sandcast Weber Carburettors and a Custom made Aluminium Air-Box. The engine also incorporates 'D' Type Camshafts, Forged pistons, Custom made connecting rods and a 'D' Type polished Crankshaft. A lightened flywheel and clutch are fitted with a JD Sport 5 speed gearbox and Custom made Limited Slip Differential. A Custom made aluminium radiator, water pump and upgraded cooling system were also specified.