The importance of measuring bell housing runout.

I am convinced this was a problem right from OEM on my 70 RR 440-6. It had one of those hated scalloped fake 11" clutches (10.9 or whatever you want to call them) and it never released that clean, and wore pilot bushings like nobody's business.

Like you, we we all kids then, no internet, and even though it might have been mentioned in a magazine or two, well, ..............................