Couple questions about fluid lines

[Low69CST]

1) I converted my 69 to discs and left the orginal drum tab for the flex line in place. To meet it looks like it may pinch in a tight turn. I've seen disc brake trucks move the point to the front side of the crossmember. Look like a problem to leave it here?

2) My headers come way up on the inside of the frame and I'm bending brake lines to go from the frame to the cylinder. Is there clearance to bring the lines up behind the shock, between the frame and the inner fenders?

3) On my transmission, the things that metal loop screws into, are those fittings that unscrew? Can I replace these with an NPT to AN fitting to run braided stainless lines? I think i asked this before, but can't remember.

Thanks