You do have an 11" flywheel in that picture. If it's balanced for the rest of the team it's OK to run. Pedal pressure is typically a result of pressure plate load differences, not diameter of the clutch.
24 teeth X 6 = 144 teeth, for Mopar is an 11" flywheel.........
View attachment 1083163
.....a 10-1/2" flywheel will be 130 teeth. 21.5 teeth between bolt holes.
The '73 Dodge and '72 Plymouth FSM may be available to downlod here. Best price anywhere. The site is being updated right now so not all links are ready..............
Service Manuals – MyMopar
One of these can be helpful.............
Mopar Performance Mopar Chasis 8th Edition | eBay