A torque converter, flex plate question, and install question..

Yet another question from me.

When I bought the '75 duster, i also bought some some parts.

One was a new torque converter that is filled with trans oil. I think. Some has leaked out. I have read on this forum that the best trans oil for the 727 comes from Wall mart. Does that also go for the torque converter. My gut feeling is to empty what is in the unit and refill.

Do I bolt the flex plate on to the torque converter ?

I don't have any special tools ..can I just slide the torque converter on to the trans shaft followed by the flex plate and just mate it to the engine.

Should I fill the trans with oi before I install ?

Am I missing something ?

Thanks
Ian.