T-series More Engines Mod 5.0

Considering most class 8 trucks in the 70s were offered with dozens of engine options from many manufacturers, the T-series seems a bit lacking with only the Belasco-Diesel 900CUI motor. This engine pack changes that, featuring 6 engines, including two stroke diesels, as well as a few transmissions for the T-series.
Added parts include:

• V8 and V12 two stroke diesels (with custom sounds from @Semi_Sound_Doctor, and custom model)
• 3 I6 modern turbodiesels (with custom sounds from @Tronadorous)
• 10, 13, 18 and 14 speed manual transmissions with realistic(ish) splitter and rangebox behavior.
• 6 speed automatic transmission (with custom TC lockup logic by @default0.0player)
• 12 speed AMT transmission

Spoiler: Engine Details

CM D95-8 V8: A 12.5 liter 2-stroke V8 diesel. With twice as many power-strokes as a 4-stroke engine, the D95-8 generates plenty of power without the need for forced induction (other than a blower to help scavenging). However, it is available turbocharged for those who want a little more.
N/A:

Turbocharged:

CM D95-12 V12: A 18.7 liter 2-stroke V12 diesel. With enormous displacement, this engine puts out enough power to move mountains, beating the most powerful Gavril engine by a fair margin. Don't expect good mileage from it though. Also, due to it's extremely high power, it is not suitable for use with automatic transmissions.

Jargl J730F I6: A 7.3 liter I6 turbo-diesel from Jargl. It's has been replaced due to being to underpowered for the T-series, but remains in the mod for anyone who wants to use it.

Jargl J940B I6: A 9.4 liter I6 turbo-diesel from Jargl. Larger than the J730, it provides more power without sacrificing too much efficiency. It is much more capable with heavier loads, and can manage highway driving without much trouble.

Jargl J1080B I6: A 10.8 liter I6 turbo-diesel from Jargl. It is capable of the same power output as the Belasco-Diesel, while still offering high efficiency. For those that can afford it, it is superior in every way.

Belasco-Diesel 1150CUI I6: An enormous boat motor converted for highway use, offering up to 800 HP.

Spoiler: Transmission Details

It is recommended to set an easily-accessible keybind for transfer case mode toggle to make using the rangebox/splitter easier. Unfortunately, things are going to be a little awkward to control until more in-depth controllers are added, so arcade-friendly versions of transmissions are offered.
CM Manual Transmission: Eaton-fuller inspired 5-speed transmission with rangebox-splitter. Comes in three versions.
10-Speed: Splitter only. Shift through gears normally, using the splitter when needed for half-gears.
13-Speed: Splitter and rangebox. Start in LoLo, shifting through gears 1-5 as normal. Once 5th is reached, tap the transfer case toggle to move into low, and shift back into 2nd. Continue through the gears, tapping the transfer case toggle once to split the gear, and tapping twice to unsplit.
18-Speed: Splitter and rangebox. Start in LoLo. Tap the transfer case once to split gears, and tap three times to unsplit. Once 5th gear is reached, tap the transfer case toggle to move into Hi range, and shift back into second. Continue through the gears, tapping the transfer case toggle once to split the gear, and tapping three times to unsplit.
Jargl 14-Speed Manual Transmission: Volvo inspired 4-speed transmission with rangebox-splitter. Start in LoLo. Tap the transfer case once to split gears, and tap three times to unsplit. Once 4th gear is reached, tap the transfer case toggle to move into Hi range, and shift back into second. Continue through the gears, tapping the transfer case toggle once to split the gear, and tapping three times to unsplit.
Jargl Smart-Shift Transmission: Volvo inspired AMT transmission. Doesn't fare well on hills. When the 14-speed crawler gears are installed, use C to hold the transmission in crawler mode, or H to skip the crawler gears. K and B do the same in reverse.


Note: This mod is WIP, the Jargl engines do not have a custom model.