True about the high RPM sixes, but they were all very short stroke low CC engines. You can forget about reving longer stroke high CC sixes. BMW make a beautifully balanced high performance 6, but again it is an over square engine and only around 3000 CC. The beauty of sixes traditionally in the conventional auto range was that you didn't need to rev them, the original 250 cu" Falcon six developed max torgue at 1200 RPM.