I do know the blacktop is exactly the same as fitted to the 2 litre Mundane. They love a set of Yam R6's and an EDIS6 ECU for sparks. In fairness, they're pretty mad on a Webber 40, but they're mental on R6's - especially under the bonnet of a Mk2 XR2, where torque steer in 5th will try and put you into the nearest ditch in a 100 mile radius.