Hello and welcome to the forum. In answer to your question of whether turkey necks are safe, I don't think that anyone can say with any certainty that they are from the point of view of choking. You say that your dog is an aggressive chewer so I would be very careful if you do give them and never leave the dog unsupervised.
Re salmonella, you already know that bacteria can be a risk in raw meat. There is need to take extra precautions, particularly around vulnerable people such as babies, children, the elderly and immunocompromised. Bacteria can be shed by the dog, particularly around the mouth/saliva and chewing will possibly spread the risk. Some raw feeders doubt this but the evidence is clear. Vets regularly see dogs who have infected themselves due to licking their wounds. If you are going to give bones/body parts then it is best to give them to the dog in an area of the house that can be cleaned properly or in the garden.
A lady who was a specialist retailer of raw dog food told me that if a pet owner wasn’t comfortable with this method of feeding (including bones), it was best not to proceed with it. It was good advice. We should enjoy having our dogs, not be made anxious by what we give them to eat.
Many raw feeders give bones and body parts such as wings and turkey necks and are quite happy to do so. You have to read up about the pros and cons so that you can make up your own mind about it. It’s useful to remember that if there are any mishaps it will be the vet who you will turn to for help, not the person who tells you that it is ok to feed this or that. IIRC the veterinary associations do not recommend giving bones due to the risk of obstruction, peritonitis and dental fractures.