If you find that the alternator isn't the culprit & your battery is good, & you're down to checking for & finding a current draw as described previously with everything off/closed (trunk, hood, doors, glovebox, etc.), you can pull fuses one by one until the current draw stops. The removal of the fuse that stops the draw is the circuit where the short is. That will at least narrow it down for additional searching. The last problem I had like this was the 4-way flasher switch in the column of my '67. It wasn't all the way on or off, just enough to draw "juice". I used a small test light, since I don't have a meter. I've also had door jam switches (courtesy/dome light) do that to me also. They provide a ground to make the lights come on & mine was a small short- not enough to light the dome light, but enough to discharge the battery. Another culprit was the cigarrette lighter, which seems to be a popular place for prior owners to splice things in, from CB radios to you name it. One more thing, if you have a radio with a clock, etc. that has battery power going to it all the time, it might be one more place to look. Good Luck & let us know what you find. Odie.