Bronze gear necessary??

Okay, I must be dense today. I go to the Crane website and I see gears for Ford, Chevrolet, and Holden (Holden?) but no Mopar. And, the gears that they are showing are either bronze or coated steel, nothing identified as "composite". What am I missing?

The coated steel gears work with a billet cam. I posted the small block # in post #7. The BB # is 66970-1