330x32mm GTA discs will be too thick for the 166 caliper.Handy hints for anyone doing this themselves. If you have 17's I'd highly recommend 330 gta discs as it would allow calliper to mount pads in optimal position and need smaller spacer size on wheels... i'll likely go new brackets and 330's when pads and discs need done.
Neither of the bolts holding on old calliper hanger or m14 166 ones look fine thread?Are you using the nuts and bolts you've shown in the picture to fit them to the hub.?
They have a standard pitch thread, caliper or carrier bolts always have a very fine thread to lower the risk of them working loose, if you are using bolts with standard pitch thread then you should at least be using lock tab washers.