1996 Chevrolet Tahoe, Need 12 Volts During Cranking

Hi, In 2019 I put a 383 motor in a 96 Tahoe 4X4. It has the MSD Atomic EFI fuel injection, MSD 6AL ignition controller, MSD Blaster 2 coil, MSD Atomic TPS controller, and the trans is controlled by a US Shift Quick 4 controller. To start the truck I turn the key to the on position, then I have a push button to crank it over to start. My problem is that sometimes when I push the start button I only get a clicking sound from the starter. I think that the problem is, the 6AL controller needs 12 volts in the run position and during cranking. The wire I have it hooked up to drops below 8 volts during cranking. I need help finding a wire that puts out 12 volts on run and during cranking and doesn't drop in voltage. Thank you very much for you help.

Pink wire at the Ignition switch harness.Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

Thank you very much for your help.