There are some missing textures in the addon version. The trim pieces seem to switch around to different textures. Other than that, it's a good model.
You have to use another script to push the car onto the flatbed. I believe RealisticVehicleFailure includes the Shift+E commands to push disabled vehicles.
For RHD cars crashing FiveM, change 'LAYOUT_LOW_RHD' to 'LAYOUT_LOW' in the vehicles.meta file.
No compatible with FiveM. All the files are in the right spots, and the resource loads. "Invalid vehicle model" for rx7tunable and rx7tunable2.