will need injectors soon... whats best?

[1984_6.9er]

I believe my injectors are their last leg... one of them visibly leaks, and with brand new motorcraft glow plugs it still starts hard when cold, or even if hot but sitting for 20 minutes or so. once it's running for a little bit it smoothes out, but it is a little rough at cold idle, and starting surging a little at idle for the first time last night. I figure if one is bad, the other 7 are on their way and i have also heard the only way to do it is to replace all at once. which injectors should i buy? I have heard delphi injectors are good, but i don't want to spend 500 bucks if I can get away with it. NAPA sells "echlin fuel systems" injectors for $35 each, and as a broke college student, i like saving $200 if i can. are these injectors any good? I am just looking for stock replacements, I do not need performeance injectors, won't be racing people with 10k trailers, I'm just looking for a decent stock replacement. The first owner gave me the old injectors (stock, factory) with the truck, they have 95k on them and that was the last time they were replaced, the "new" ones have 170k on them. the old ones have "BB" stamped on them, so common sense dictates these are BB code injectors? It is a 1984 6.9 idi NA, no turbo, and i believe the IP is factory and has been rebuilt once or twice. So really my question is are these NAPA injectors any good? are there any other more affordable and still reliable options? and also, while doing injectors, it would probably make sense to do lines, caps, etc? what parts/kits should i buy to do that as well? is there anything else i should do as well while im there? and while this may be a rookie question, what exactly is the function of the return lines? what fuel is "returning" and to where is it returning? sorry for the really long post... just wanted to get every bit of info out I could about the truck and its history, and get my questions in too... thanks a lot guys!

[stumiister]

I would check the local IP, injector rebuilders see what they have to offer, but I would go with a matched pop tested BB code injectors.

[1984_6.9er]

okay, im going to be running down to the injector shop 20 minutes off campus this week to grab some more "olives" and ill ask them, and theres a shop about 40 minutes from home that has a VERY good reputation so i will also call them or stop by next time i am home. a matched pop tested set would have to come from a shop which rebuilds them i am guessing? thanks!