Most ls swap builds you see with the ECM TCM are under the hood in plain site and in my( OPINION)
look to bulky and take up space. I found the perfect area to mount all this while its a clean install and straight forward. you never ever see it. You will have to remove dash parts to make this happen. but like I said its a super clean install. Take a look.
https://youtu.be/6PWsL6VDxTg