I spent a little bit of time looking into rear main seals. I was trying to find something "super trick" for a dry sump engine. As far as I could find, there are only a couple of seals on the market. The standard one and the Viton one. It appeared to me that everyone in the industry just resells one or the other.

Maybe I'm wrong? Does anyone know if anyone else is making something different? My guess is that Dvorak is just reselling the Viton seal but maybe he had something special tooled up just for him?

There are special seals available for Chevy and Ford motors, but I didn't find anything for Mopar big blocks.