Chrysler Pacifica Engine swap ideas??

[gasninja]

2006 3.5L v6 2006 Chrysler Pacifica AWD.

Anyone know of a smaller (2.x)liter engine that would mate to that tranny?

So far i got a few ideas already to save fuel:
[1]0w-20 synthetic engine oil +lil Tufoil.
[2]Synthetic ATF{any suggestions}
[3]Redline shockproof lightweight gear oil.

[4]Higher output alternator.[to combat E10]
[5]Hotter inginition coil.[to combat E10]
[6]Low resistance wires.[to combat E10]
[7]Spark plugs with larger gaps{any suggestions best type}.[to combat E10]

[8]Some kind of piggyback fuel management system that allows adjust air-fuel ratio to 16:1 -to- 17:1?
[9]Lighter battery{any suggestions}
[10]Possibly ditch airbox for aftermarket air intake=weight savings?
[11]Possibly find lightweight exhaust headers=weight savings?
[12]Find cool lightweight 18 or 19inch rim+tire combo?

If a swap is not possible, any ideas on internal mods that would make a real difference, eg lightweight pistons/connecting rods/valve springs, or fuel-saver cams suppliers?

Want to keep budget under $5,500!

[ksa8907]

I have an '04 awd, the biggest thing working against these cars by far is aero. If an engine swap is what you want, the 2.7, 3.2, and 4.0 v6's are the only ones that would be reasonably easy.

Also, keep in mind the awd version is a 4700lb car, a smaller engine will probably make it pretty gutless.