DaveW
Looks like you have a E38 ECU as 12597121 is the same P/N as mine, it will have E38 cast into it on the finned side. Look at your harness it might have 3 connectors for the ECU if it has 2 you will be fine, Justin will be able to put any tune in the E38 that can use a BCM so you will have cruise. Does the "new" CR still use the Barina collum? You might be able to fit Late model Commodore cruise switches but you can use any that will suite your interior.
The P/N for your LS7 is 09 on. Dont forget you will need to prime the LS7 before you crank it as the
oil pump will not pick up
oil on first crank from factory!!!!!!and read the instructions on checking the
oil as the LS7 hides a litre in the engine.
If you can get a VE harness and BCM and pedal for next to nothing you should be able to set up cruise for not much. Ring Justin and ask him what you need he will be able to set it up no problem.