GMC Brigadier Interior with a 6v92 GoPro

Just another quick video with the new GoPro Hero4. This time you can join me in the cab of this insanely loud beast. The truck is a 1985 GMC Brigadier with a Detroit Diesel Silver 6v92TA @ 350HP. The transmission is a 9 speed direct Fuller Eaton. Exhaust is dual straight pipe 6" stacks.
*Note that around the 1:38 mark or so a cute little Dodge Cummins with a bed stack drives by. I couldn't hear him, but I saw the smoke come out of his stack when he revved up.