The crank pullys on my friend's project are looking fried.
Swapping the AAZ serpentine belt setup onto a 1.6.
The harmonic balancer pully is torn up where the timing belt rode against it and the v-belt pully is all bent, weak and rusty.
part numbers:
serpentine belt harmonic balancer pully 028 105 243 H (AAZ)or T (AHU).
Fits most of the MK3 diesels.
And the v-belt pully 028 105 253 A not sure what it comes from.