can you put a 1997 camry le V6 into a 2003 camry le v6

I don't believe that will work. I think that only a 2002-2006 will fit your 2003 model. With a large span of years like that, usually the engine mounts, wiring harness, computer, among other things are slightly different. I would try to find another engine from a salvage yard that is compatible. Sometimes if the engine isn't damaged beyond repair, it's just as easy to rebuild it rather than do a swap with some salvage yard engine that you really don't know anything about.