What brake line set should I buy 71 or 73

Demon 408 said

If you're using the 73 prop valve and correct disc/drum master (manual) you can use the 73 lines through out. That's what I did with my 72 Demon.

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Thank,s for your help.now are the prop valves. The same from power to Manuel on the 73 duster if not can some one show me pics of the two so I know what one to use ?