WO WO Take it easy guys.

This got very technical. lets take it back down a few notches. What is IP ?
What do i have to do with the fuel system? just adjust it? Or add parts?
So from what i have learned:
Oil: from T-piece added to the preassure-feeler thing, return in sump or push-rod cover.
Water: from the drainplug on the block to the hose going out from the termostat.
Exaust: 2,5 or 3" with a "flow-through" silencer
Intercooler: to late, it's already bought. 250x500x76mm 3"in-outlet.
Turbo: To small better than to big?
The easiest to get here i think would be something from a 2-2,5 liter petrol-engine. From Saab or Volvo maybe..What else is there to concider. any small pipes, vacuum, fuel-regulation and so on????