Update - 3D model is almost ready and wanted to check how it looks ingame so i slapped on some placeholder material and jbeam and this is the shape currently. There is still good amount of work left. The name will be changed to 4-Door Coupe when released suggested by @Bekwennn:)
Update - things got delayed because i was busy and also got a new pc so needed time to set everything up but now work has resumed and the progress is as follows: 3D model and jbeam are ready (thanks to @Bekwennn:) for helping with tailgate jbeam hinge mechanism). Only materials are left now.