????Any body know????

 

The 3.5L had variable timing control camshafts, for starters. The intake was differant, the stroke was differant, harness and ECM, to name a few things. You'd be better off trying to find a 3.5L Maxima or Altima in a junkyard (good luck) than trying to convert the 3.0L. You can do quite a bit to the 3.0L and depending on what you're going after, it may be more beneficial to use the 3.0L.

 

the 3.5 is a far better engine, but both are great. The VG and VQ engines are some of the best engines in any car.

 

Replace your 3.0 with a 3.5; a good condition junkyard 3.5 is only US$1000 or so, which is far cheaper than the labor and parts involved to bore and stroke a 3.0L to 3.5L-- hell I don't even think you can get a 3.0L block out to more than 3.3L or so with factory VQ parts (VQ20, VQ25, VQ30, VQ35, VQ40....)...