Skip replacing the two hpop lines and the four hpop end fittings. Overly complicated part for the hpop lines. CNCFAB LLC made a nice simple design replacement kit thats 50% of the cost and with 1/4 of the extra parts. Very common upgrade for the 7.3l. Been running mine trouble free for years!
Corey who owns cncfab llc is also a forum member and well versed in the 7.3l hence he started his business years ago.
the hose kit you need: CNC Fabrication Early 99-03 7.3L Replacement HPOP lines - 7.3-SD-HPOP-LK
if you want to buy fords look at riffraff diesel performance and or dieselorings but you'll have to order two hoses and 4 end pieces for around $300+ after shipping. Also dont just take my word for it. Research cncfabs hpop line kit for yourself and you'll see its a common swap when the oem ones leak/fail.
