I'm not familiar with the original but I love songs like this. I'm guessing you have all the parts as they are (were) and I'd say it's pretty good as it is.
I did get the feeling that some of the guitar sounded distant, which might have been part of the original sound? It kinda sounds like your neighbor is playing it with an amp in his backyard and you have slung a microphone over the fence to capture it. It's a nice lonesome sound but I'd want to bring those guitars up closer to the listener, just a preference I guess.
The guitar playing itself was really good, nice job there!
cheers and have fun,
-Tom