Beta Gavril Grand Marshal V8 Twin Turbo 0.63

This update fixes the fact I based the previous update on outdated jbeam files. The automatics now have torque converters and the manuals flywheels. I also added a drag automatic with transbrake. I hope I actually got everything right this time.

Apologies for the late update, I wanted to include extra parts but I sadly don't have the time to finish them, so this update does not include any new meshes.