If nine people reply, you'll get nine different answers. Depends on what you want to do with the truck. Big Oil never hurts, even when your mostly stock elsewhere, and then its there when you start building up the rest of the motor.
What do you do with your truck? Big Oil is not necessary with the right injectors. I will never have big oil, but I am going with 180cc Stage II singles and wont need it. Tow Rig and daily driver for me though.
Big oil is not necessary but it made a huge difference in my tow rig. IMO it was worth every penny I spent on it. If you can stand the flat stop on the top end then just do some good injectors like AC's or Hybrids with tuning.
DDP makes some of the best nozzles in the industry, however currently they don't mod the internals of the injector. However you can get built injectors from many places and get DDP nozzle on them if you want. Talk to your favorite injector builder for their options.
You won't see the real benefit of injectors or big oil until you get a custom burned chip. My advice would be to get a good chip first, then do injectors or oil. Unless you have the money to do the chip also when you get the injectors or big oil.
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