Door alignment

I'll post this in the emergency forum as well as I am sick and tired of my doors. My '73 240Z has doors that just don't want to click. I have to slam the poop out of them to get them to stay shut all the way. If I simply close them gently or my wife does, it closes but one could jiggle the door maybe 1/2" or so. The solution up until now is to slam it hard, sometimes three or four times, to get it to shut. There has got to be some way to adjust them so you can shut it regularly and it stay shut and not jiggle. Of couse when it jiggles, it will not lock. Please help!! timberwolf@geotec.net