Had an idea driving tonight
One of the LED light bars
Mounted inside the windshield (at the top)
With a cowl (to prevent the light from reflecting down/back into the cab)
Like the unmarked police cars (but with white lights)
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2005 GTO 6.0 V8 (600hp)
1991 Geo Metro 1.0 3/5 base
2010 Prius II (replaced 2001 Tahoe 5.3 V8 April 2014)
1994 F-350 7.3 TurboDiesel (Rollin' Coal)