Pontiac G8 GT, disabling DOD (disable on demand)

[Lynn]

My son is contemplating a G8 GT for his wife. Three kids, so she needs a four door sedan, but wants some performance pop.

Found a car that fits all their criteria, but it has been modified a bit.

Most mods are just bolt ons; but recently the owner had the cam swapped for a DOD replacement cam. Supposedtly the ECU was reflashed to remove the DOD feature as well as the active fuel management (which I believe simply works in tandem with disabling those four cylinders.

Anyone have any experience with this upgrade? My understanding is that you must plug some oil passages when you do this upgrade. Any chances it will cause issues?