Was wonderin the difference between a 153 and 168 tooth clitch just the clutch size it can hold and starter?

Also foun a couple clutces and fly wheel on hays don't know the link but te part numbers are

Clutch kit #85-112
Flywheel # 10-130


Josh
72 gmc lwb air ride 5 speed (soon) turbo 292 II# 6102