I'm using Holley sniper 4500. If you don't take it and have it dyno tuned, it takes forever to get it calibrated right. Steep learning curve if you have no tuning experience.
I've finally got it close to being right. If you let it continue to compensate as you go down the track the E.T. will be more consistent than carb. Or you can lock the tune and it will behave like a carburetor and your numbers will vary according to weather. I highly recommend you have it dyno tuned. Also, I have no experience with alcohol carbs.