Distribution block r&r

I am putting a Dr.Diff disc conversion kit on my 69 Roadrunner and I'm at the point where the distribution block can be installed. Do I remove the lines from the block first and then remove the block from the frame? Or vicey versey? Also, do you access the d-block from the top or the bottom? Thoughts?

When you put it back together don't bolt D block to frame until you thread in a little by hand. To easy to cross thread them.

I think I would break free the lines first before removing it from the frame.

I did this recently (last winter or the one before) and as I recall I had the torsion bar out for replacement as well. This made more room to get at it. I broke the lines free before I unbolted the distribution block from the frame.

There was one issue that bit me in putting it back together. I was replacing my brake lines with stainless steel ones at the same time and I wrecked one of the sealing seats in the distribution block when reassembling it. The SS line was quite stiff and I didn't have it lined up quite right when I tightened it. It pulled up against the seat slightly cocked (I had assumed the the nut would align it once I got it started, but this didn't happen) and it damaged the seat when I tightened it. Just a warning to be careful about the alignment when tightening. Because of the stiffness of the SS lines, I will probably go with the cupro-nickel brake lines in the future as they are also corrosion resistant and are much more flexible for fitting. Cheers!