I ordered new quick tach pins for the tractor. Some had suggested replacing the springs but I decided to order the whole piece ($62.00 for both). The new ones are a bit longer than the ones I replaced. So far the bucket seems to fit tight and the pins are holding it in place firmly. The springs are not fully compressed on the new unit but it seems to work fine.
The arms were not twisted or damaged as some suspected. The previous photos showing a gap between the bucket and the SSQA plate was of the bucket coming off and the pins in the down position. Normally the ssqa and back of the bucket fit flush.