I'm looking to buy a Holley EFI kit and was wondering as anyone installed this and used the factory dash gauges in a 4th gen Camaro??

 

This maybe be of interest someone says the stock 97 LT1 dash gauge worked for him with Holley EFI. Seems like the LS1 98-02 may not. The thread is from 2014, I don't know what may have changed since then.
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Holley EFI and 4th Gen dash gauges

Might be worth contacting Holley to find details.

Holley Dominator EFI & gauges

There's a thread on the Holley forum about the question too.

Holley EFI & 4th Gen

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Does the system allow you to track your mileage since your losing that feature by removing the stock gauge cluster?

 

The 7" and 12.3" LCD screens do have an odometer if you need one.

 

This...

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The Dominator has a programmable speedometer output. If you get this working with the older gauge cluster, the OEM odometer should work as before.

Andrew

 

I have a C5, basically my factory ecu controls my gauges bcm etc, and the Holley controls my motor and boost related items.
It's more work, but i wanted my oem fancy stuff. def easier to just do a holley dash, especially in a fbody