It's an F4 view. You must only edit a line in the Server.lua. I used this parameters:
"RearCameraPos = {cockpit_point[1] + 0.35 ,cockpit_point[2] - 0.01, cockpit_point[3] + 0.05}"
But, if you want to see the headmovement too, you need an other client's track, because your track (or offline track) does not include this.