Anyone know what parts of an AT can be upgraded to increase torque capacity?

I only see two items.

Z1 Excedy Race Clutch Packs
&
FI Aluminum Flex Billet Plate

Will these two items be sufficient enough to increase torque capacity for the 370z AT?

My understanding is the valve body is a weak point for failure as well. I know level ten also has a built torque converter they use on their upgraded AT 7'S. I feel it's safe to assume there are other parts as well but these seem to be the major parts they upgrade.

Ugh. I was hoping that the Z1 Excedy Clutch Packs and the FI billet plate (comes with Torque Converter hardware) would be sufficient enough to SAFELY increase it to 500lb Torque...since 425lb torque seems to be the limit for our 7AT