I've pulled my '90 vg30de due to age issues. I have purchased a '91 vg30de and have begun furious work.

Something's I've noticed:

*1_ Oil pressure sensor was opposed. I have switched it to the oil filter bracket. Leaving behind the line and brace on the left side, simply plugged by the plug I removed off the bracket.

*2_ The EGR has a secondary brace on the left side of the motor. If I was to leave the EGR in I would simply use the origional-to-car hoses.

and it may have an alternative ground wire, but I have yet to sort through all of my info.