Transmission Identification

[Kisner]

Decided to call TCI Automotive back and got a different salesman. This one says their pan will fit my transmission with no problem. I may have confused the previous salesman as I think he thought I had a pan-filled transmission. Now my new question is this particular pan holds an additional 2 quarts of fluid and comes with a pick-up tube extension. I've only changed the pan (not even the filter - previous mechanic did that). How hard is it to put on this pick-up tube extension since I've never done that. I assume it's behind the filter. Does the valve body or anything other than the pan and filter have to be removed? Finally, I'm going to go ahead and change the filter again while there since it came with the new gasket. I've heard there's a pin, spring, or other small parts that are held in by the filter. Does anyone know what these are and where they go back to? Thanks.