Could try to rewire the controller to work with the og, Would be a pain but it would be beneficial in the long term
If you managed to do this, you would be re-writing Commodore history.
There have been many that have tried before.
I really don't get what you are trying to do? I mean I get you want to run it on a track, but thats going to grenade in a day. There's a $6-8k recon and it won't be a good one.
It is easier to do a 6L80e conversion on an older Commodore. There is quite a bit on these conversions now here on the forum, just not on a series 1 VE. The CANbus networks are too complicated. You could do it if you rewire the car and design new modules for the task, or buy a smashed series 2, totally strip both the cars bare and swap it all over into yours giving you the direct injection engine and 6 speed auto. Or you could sell yours and just buy a series 2.
You straight out have the wrong car for the task.