Some update from the long weekend!!
It didn't start very good after removing most of the connector that aren't used. I couldn't get the push-start to unlock and go in ACC / ON position.
I tried finding the wiring issues of what could be the problem for about an hour before giving up. In the dash wiring harness, there is a few wires that cross each other and I only removed the useless wires which should technically not matter.
The end result was to by-pass the push-start and the BCM to a similar setup I did couple years ago on the NATS by-pass. I was then able to get power in the cluster and power up the engine !
The next project was to paint the cage! I was unsure of which color I wanted.
Removed some useless wires...
Lexan windshield cut and then the beginning of a whole new diffuser !
I think Im gonna love the new one