Crossover needs to be rotated, all the joints need welded, the front flange, they used identical flanges, so the front has an egr provision sticking off, it will hit the lower rad. hose if you leave it, needs hacked off, and on the rear, the egr hole needs enlarged to 5/8".

That is all the modifications. the slip joints fit kinda sloppy, but i guess it doesnt really matter since you would be welding.