...because he's likely to know: do GM 10.4" clutches mount with a 12"/6 circle evenly spaced? If they do, a GM clutch via first-gen F-body or other will bolt directly to my Rover V8 flywheel no questions asked. Thus leaving me only to burgle an F-body throwout fork/stud and to buy a bellhousing + get a bushing to complete a T10+RV8 setup.