Need help ID'ing crossmeber/suspension/brakes

[19GMC63]

Working on a 64 with what I believe is a 71 or 72 crossmember. Is this correct, based on the attached photos? Let me know if you need more pics.

Looking to replace all brake components, go through suspension, and maybe change to drop spindles.

If this is indeed a 71/72 setup, are there any particular brands/vendors y'all recommend for pre-formed front brake lines? I really don't want to bend and flare my own, mainly out of laziness and time constraints.

Thanks in advance for the help.