There will be a pan under the fly-wheel, Remove this pan and find the plug.
Have a LARGE pan ready, Some of these torqe converters can hold 8 quarts.
The C-6 tranny are 1 of them (I think...)

 

Anyone know the capacity when you do a torque fill?

 

if there is a drain plug on the torque converter then it will be on the bottom of the converter ! roll the torque converter around until the plug is on the bottom, take it out and drain the converter ! don,t forget to put the drain plug in and tighten it pretty tight !

 

the whole trans. is about 17qts and btw it's measured in pints so buy at least 17 qts of type F trans. fluid that should get it pretty close to being full as like I said before don't overfill it