I think most every manual fly-clutch-pressure plate deal will be rotating more METAL mass than the big converters.
Quote ""...my 6-lug conv weighted 38 Lbs Half-fulla fluid""
Converter stalls and tightness: just figure that GM et al, does have a method to match converters to the vehicle weight, engine and gearing.
Aftermarket Converter shops barely get that right. ECM must have found the real matching method because those ECM cars accelerate thru the mid-track like none others.
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