How to I.D. a push type clutch setup for a 13 speed?
 

I'm wanting to put a 13 speed in my F750.

I need a push type setup to make it work with my hydraulic slave setup from my 6 speed.

I'm not very familiar with Large eaton transmissions. How can I tell on the bellhousing if it's pull or push type?

Most if not all the class 8 transmissions are push type. In my experience only class 6 trucks were pull style clutches. The hydraulics slave cylinder won't work on the larger trannies, you would need to convert to a mechanical rod system.