That's a slick setup, Norm, but will only work for 1987 and later.
I've seen 1987 Marinettes with both styles of Chrysler's.
The earlier dip tubes go into the the block at the top, unfortunately.
On mine I have to remove the tube and take trim tab hose and weasel it in, down and around the bottom of the pan. Its a pain and almost never get it all out.
I use a little impeller pump mounted on a bucket. The pump works well but the rubber impeller does not hold up. I suppose the dirty oil destroys it over time.
Search Google for oil change pumps and oil change pump reviews.
-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors