Avoid Decoding?

Just had an Idea and wanted to see what you guys think.

I am working on doing a swap into a 2009 Honda. Im running a linkG4+ Extreme. My goal on the car is to keep everything possible as OEM. Meaning I want to swap my drivetrain but I want it to look like Hondfa put it there. All AC, factory cluster etc.

I have done alot of work decoding the bus already but I just had a thought.

Can I leave the OEM ecu in the car? Only connect the parts that would control AC / power steering / cluster etc and just let the link to work the engine, trans and other fun stuff.

Does anyone has any experience with a similar setup?