How do you intend on putting the new spring on? Old rope in the hole trick? If it really droped the stem would be bent,When you pull up on the valve stem does the valve make a nice Plunk sound when it seats? If so You should be good to go with a new seal,spring and retaining hardware.
I was thinking something like that haha. I think I may just go buy a compressor and run an extension cord from my apartment.
The valve definitely is seated well. Just went and checked and its fine.
Thanks!