Please help me trying to swap a 2014 engine on my 2007 nnbs
 

Does anybody know what will i need to mod please need help thanks in advance

Just spit balling some parts here but I'm pretty sure you are going to need the motor/transmission, wire harness, computer, upgrade your fuel system for enough fuel flow for the DI motor, motor mounts.

Custom tuning and figure out a way to make the gauges work. The ECO Tech 3 Controllers never had a 4L60e transmission so that's why I said transmission as well.

Thanks, i have motor trans cats driveshaft and wiring harness do you know where i can get the ecu from?

Junkyard/wrecker or you may have to contact a dealership and see if you can buy one new. Not sure if you need an exact VIN number though to match the motor/trans combo or if there is another way to know what you want.

I believe the gen 5 has electric power steering. Might want to look into that!

You may be able to get a computer from the following places: GM, Speartech, or PSI. Speartech may be your best option at this moment, I would recommend calling them and seeing if they have any info regarding the harness and computer.

Would it be better if i sell motor and get a 2013?

If you wanted probably an easier swap, yes it would be better to find a GEN 4 engine.