Ebay GT45 + 5.9 Magnum + E85 blow thru

I ran the fuel pump ground direct to the battery, 12 gauge wire. Measured voltage at the pump and I'm getting ~13.6-13.7 so voltage seems to be good. I did a back of the napkin power budget and I think I'm around 70amps with everything running.
Electric rad fan = 11-12 max, 30 at start
Fitech = 25 max
AEM Fuel pump = 25 max
Everything else = 10-15 amps?

Went for another run and I'm still seeing fuel pressure drop as low as 30psi. I even turned off the rad fan (it's on a toggle). To add to my confusion the Fitech logs are showing fuel flow increase as boost/rpm rises.

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