This is a good start but it needs a few fixes. I think the side mirrors are flashing because the external mirrors are visible from the cockpit. Try setting the LODA copy's LODIn to more than zero.
.......................
MASFILE=Mustang_Mini.mas

//---

Instance=SLOT<ID>
{
Moveable=True
.
.
.
MeshFile=mustang_mini_mirror_l_loda.gmt CollTarget=False HATTarget=False LODIn=(0.0) LODOut=(40.0)
.
MeshFile=mustang_mini_mirror_r_loda.gmt CollTarget=False HATTarget=False LODIn=(0.0) LODOut=(40.0)
.
.
.
Note: LODIn needs to be greater than zero.

Love these things ... well done for finally bringing to rFactor2. Keep up the improvements. If you ever get the chance to see these race in real life you will not be disappointed. Best fun you can have with your clothes on .....

mirrors and seat need to be slightly adjusted. idk if i can adjust the driver back and not get the steering wheel clipping but the mirrors seem glitchy.

great love these little things, tyvm for bringing them to rf2.

congratulatios, nice physics, force feedback and tires! if anyone can help with 3d graphics will be best of the best ARC

No Holden? Why you call it Australian?

i was expecting this one thanks!