Yup, exactly correct. If you want to use an R380 and still retain the Series recessed front end, you need the Stumpy. I just picked my up at the airport last weekend. Beware though. The Stumpy will not bolt to the Rover V8. You will need an adapter plate, use a Series 9-1/2" clutch, drill the Disco flywheel to match the Series clutch, cut approx 1/2" off of the V8 crank and fit a bushing adapter for the gearbox input shaft.