I just bought another 04 last week with 2100 miles. The boost gauge shows 10" vacuum when the car is off
New gauge is waiting at the dealer (warranty) If this one dies I will put a mechanical gauge in it's place.
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1996 Viper GTS 9.28@151 (yep, daily driver)
2004 SRT-10 black
2004 SRT-4 electric blue (sold)

1994 Formula blown/stroked
1967 Outlaw 10.5" Camaro 598ci
2004 Dodge dually"extra smoke"