help with 71 front hoses.

[daily_danger]

Good afternoon,

I hope to get around to an intro thread when I get some free time. All my spare time has been spent either working on the truck or searching for info.

PO installed Bell (i believe) 2" drop spindles. I need to replace the front brake hoses. They're old, and in one spot the cotter pin was stabbing the hose. I've done my fair share of searching, I've seen a few different answers. Are these 71, 71-72, or 73+ front calipers. If I replace the calipers at a later time, will I only be able to get 73+ calipers? I'm strapped for time and playing games trying to match up hoses will bite big time. Any specific part numbers for hoses would be MUCH appreciated.

Thank you for any help!

Details on current setup:

1971 C10 LWB

2" drop spindles

Large square banjo

Part number on R caliper: n gm 23 547 1173 (i've been unable to successfully google that #).

Pics(hopefully):