Outdated 6.0L and 6.7L Diesel for D-Series 1.8 patch, for game 0.19

- Added 3 new stock diesel d-series configurations (Now 5 in total)
- Added turbo spooling sounds
- Stock configurations have had a 8% detune (Attempting to make more realistic for time period)
- More dynamic fuel economy
- Added a 2.75 ratio open diff to rear
- Improved automatic transmissions smoothness while driving at low throttle
- Redline now acts more like a rev governor