Thanks Joe...
Do you recall the fitting sizes on the short section of the 2pc. rear you received from fine lines? Mine came with a 3/16 fitting on one end and a 1/4 on the other. The port on the block is tapped for the 3/16 end which means the 1/4 end has to join with the long section..
The Long section has a 3/16 fitting on it so the union would have to be 3/16 x 1/4 to join the sections.