Most Delta have male threads on the body. This makes it a 2-way, since you can insert a copper pipe directly into the fitting and solder it; or you can use a female adapter.
In any event, if you use threaded adapters, it will be easier if you can insert a piece of copper a few inches long and solder that to the adapter before screwing it on. This may or may not complicate the connections in the wall.
Either way, when soldering on or close to the valve body, it would be recommended to disassemble the valve. They will take some heat, but why take a chance.