To answer your original question:
https://www.jegs.com/i/Holley/510/30...SABEgKgu_D_BwE
This is what you need to run a carb. It's about $700 and you need a carb.
I bought a Holley 670 Street Avenger $250? Plus jet and tune kit $200, and Mine does not run right either.
Once you get your FI dialed in, you'll like it.
Or we can trade.