Removing oil dip stick housing from block

[BradMph]

I'm trading my 1st gen dip stick and housing for the 2nd gen version because it's got the taller housing which will help avoid contact with the alternator + cables. I also don't want the beat up rubber stopper on mine to fall into the oil pan when I check the oil someday.
I have removed the 2nd gen tube from doner, but I can't get the tube on my engine to come out of the block so easy. I don't see a set screw of any kind unless it's hidden from view. Is there an easy way to remove this shorter version tube from block?
6373

[BradMph]

I think I figured it out. 2nd gen is pushed in with a round rubber seal around tube.
The 1st gen has a flared end and the flaring is in the oil pan. Unless I can pull this through to the outside, it looks like it would have to have oil pan removed to replace it.

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