Forgot to update this.. radiator hose came in got it installed on the Duramax.
When I did the 8.8 swap I stayed with 7/16 bolts.. the front went to 1/2" when it swapped to C5 13" rotors
Finally matched the rear with some ARP wheel studs
And used Lisle 22800 wheel studs installer.
Probably should have upped everything to 14-1.5 studs as that's what the spacers come with.. and they're technically slightly bigger than 12"
When I did the 8.8 swap I stayed with 7/16 bolts.. the front went to 1/2" when it swapped to C5 13" rotors
Finally matched the rear with some ARP wheel studs
And used Lisle 22800 wheel studs installer.
Probably should have upped everything to 14-1.5 studs as that's what the spacers come with.. and they're technically slightly bigger than 12"