Moved out west and lost all my help too! Used the Motive with red metal cap and the thicker of the 2 rubber washers they provide and it worked like a charm. The bigger washer looks too big, but it is needed to seal.
You've probably already had this done, but there is a good reference in the DIY forum here-
https://www.camaro6.com/forums/showthread.php?t=545244