Rear end rubber brake hose replacement

Hey folks, I am replacing my rubber brake lines on the rear end of my 63 dart as I move to another rear end with 10" drums and BBP from a 73 dart.

I have found that the rubber hose I purchased has a screw fitting into the brake block that sits atop the rear end to distribute out to the rear drums, but that the original fitting on the rear end looks to be part of the original block.

Can anyone verify if the rubber hose on the block can be removed and replaced?

IF this is too confusing I will post pictures to help clear up any confusion.

As always,
Cheers and thanks!
John