Turned down? so that dictated oversize seals and or bearing races and such?

Cool.
I've asked about aluminum drums and sunshells for a street/strip car,( my car sees Real World traffic on weekends only) but did not receive ample complete answers. So for the most part, it has stayed with its stock Hemi drums, bands, clutches and other parts.
There are ground breaking tricks through out the trans itself that my Guru has applied for a third gear that feels like a 75 shot of Nitrous, but they're still heavy parts.
I've always wished that someone reputable or company would create Titanium output shafts and especially Titanium transmission slip yokes for the driveshaft. Lots of weight there.