Does this keep track of the progress in each learning direction?
If you use "Basic" for all of your cards, I would suggest the following:
1. Make a copy of the basic note type with add note type (name is irrelevant, just leave it as "copy of ..." for the time being) Extra > ...
2. Rename your "Basic" note type (whatever you want, just not "Basic")
3. Edit the cards of your note type (the one that was previously "Basic" but that you renamed in step 2) by adding another card. Edit the template of the new card to display the reversed order.
4. Rename the previously copied note type (step 1) to "Basic"
Now all your notes consist of two cards in your very own card type. The advantage is that progress will be recorded seperately in each learning direction without losing prior progress information of the existing cards.
It is easy to suppress the extra cards from showing up, if you do not want or need them any longer. Just search "card:" plus name of the card in the notes browser, select them all and press Ctrl + J (needs to be repeated in case you do not want the second card for new notes either). You can also delete the second card from your note type template again, just be aware that this would also delete the progress information in the second learning direction.
As it's for a once-off study, flipping the cards is easier. You can prevent your answers from affecting the original scheduling by ensuring you're on the V2 scheduler, and disabling scheduling in the filtered deck options.