Hybrids do require less oil, but stage 1's arent hybrids. Stage 1's are usually like 160cc and require more oil then stock injectors. But if your plan is just stage 1's then a regulated return and tuning your chip to run single shot injectors should be the only other mods you need. Together they...
HA! Powerstroke Man 6.4 beat me to the finish
Get motorcraft plugs and replaced them as a set. I would get injectors from Full Force, Unlimited or Swamps. You can find them in the vendor section of the site. If your truck is a 99.5 then parts for 99.5-2003 is what you need. And your injectors...
Summit will only price match if its a legit company and ad. They'll ask for their name, part#, wedsite, phone number and price. They'll look into it and if everything checks out they price match. It takes about a week.