You (or your tuner) is going to love the Holley system compared to the FAST. I am in the process of tearing out an XFI 2.0 in favor of the Holley Dominator in a first gen Nova.
The Holley EFI just seems to be a lot easier to use, has more functions that are simpler to implement, etc. The FAST just seems to be older technology now.
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