Hi. You could just install only 2.1 it's already has updated physics.
@k_p that "F1 minivan" I believe there is already some versions of it available, but its not something Im interested, so I don't know how good it is, probably it can be improved. But GT40 mk iv is available from Bazaa's pack and it's really good, I don't think it needs new physics, maybe You could have his permission to use physics for Your model?
Working wiper setup to add to your Ford Mustang 289 modification:
[MESH_ADJUSTMENT_...]
MESHES = wiper_L,wiper2_L,wiper_L_rubber,wiper_R,wiper2_R,wiper_R_rubber
MOVE_TO = modelRoot:y
[BASIC]
DISABLE_WIPER_KSANIM = 1
[ANIMATED_WIPER_...]
DEBUG = 0
MESHES = wiper_L,wiper2_L,wiper_L_rubber,wiper_R,wiper2_R,wiper_R_rubber
UNDERLYING_SURFACE = windows_ext
GROUP_0 = 'wiper_L_rubber@A=
', 'wiper_L@A=', 'wiper2_L@A=
', 'wiper2_L@B=', 'wiper_L@B=
', 'wiper_L_rubber@B=', 'wiper_L_rubber@C=
', 'wiper_L@C=', 'wiper2_L@C=*'
GROUP_0_ANGLE_TO = 90
GROUP_0_AXIS = 0, 0.70710677, 0.70710677
GROUP_0_AXIS_OFFSET_0 = 0, 0.70710677, 0.70710677
GROUP_0_AXIS_OFFSET_1 = 0, 0.70710677, 0.70710677
GROUP_0_END = 0.013323922, 0.5068249, 0.7527514
GROUP_0_PIVOT = 0.5499878, 0.4208536, 0.79086304
GROUP_0_BASE_AXIS = 0, 0.70710677, 0.70710677
GROUP_0_BASE_PIVOT = 0.5499878, 0.4208536, 0.79086304
GROUP_1 = 'wiper_R@A=
', 'wiper_R_rubber@A=', 'wiper2_R@A=
', 'wiper_R_rubber@B=', 'wiper2_R@B=
', 'wiper_R@B=', 'wiper2_R@C=
', 'wiper_R_rubber@C=', 'wiper_R@C=*'
GROUP_1_ANGLE_TO = 90
GROUP_1_AXIS = 0, 0.70710677, 0.70710677
GROUP_1_AXIS_OFFSET_0 = 0, 0.70710677, 0.70710677
GROUP_1_AXIS_OFFSET_1 = 0, 0.70710677, 0.70710677
GROUP_1_END = -0.6017755, 0.508434, 0.6851746
GROUP_1_PIVOT = -0.08255005, 0.4354515, 0.824646
GROUP_1_BASE_AXIS = 0, 0.70710677, 0.70710677
GROUP_1_BASE_PIVOT = -0.08255005, 0.4354515, 0.824646