Help troubleshooting: 1970 SB + Fast EZ EFI and MDS

I have a 1970 im getting back on the road and could use some help from the forum gurus.

The technical details of the install are below. Im able to ignition on, fuel pump runs, MSD box has lights, FAST computer comes on and able to begin setup. I set fuel pressure step, but when I turn ignition to CRANK I lose all power to computer (and presume pump and MSD box). power signal for all 3 are coming from Pink wire on Ignition (power is coming straight from battery). All the forum posts indicate this should be the perfect place. Why does computer shut off during cranking?

As title states, small block, fresh rebuild, I added a FAST EZ-EFI 2.0 system with return in tank aeromotive phantom pump, all lines are braided -6, FAST Dual sync distributor, MSD 6AL ignition with blaster SS coil. MSD box is mounted just below vacuum tank on DS. FAST controller is installed inside cabin behind map pocket (heater core is 100% removed).

Thanks in advance

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Help troubleshooting: 1970 SB + Fast EZ EFI and MDS