Haha, thanks guys.

Yes the diff was mulled over for some time and ended up deciding...well nothing. I figured just paint it, give it an oil change and try it out with the drive train and see what happens. Wheels are going to be 17 x 8 GTS billets and if it goes pear shaped, i can always slap a 9 inch in it.

Ended up in the EFI shop today and i can see more money sliding down the toilet as i get better acquainted with EFI tricks. Seems that the original Delco 808 computers on early commodores batch fire the injectors in banks, WTF? Cant believe that 4 x injectors fire even though only 1 x cylinder needs fuel to ignite. Its still doing my head in so i can see a Haltech on the horizon...