I currently own a 1976 Datsun 280z, and the defogger sucks. Driving in the rain is really scary, sometimes I literally can't see the car in front of me, in which case I have to wipe the windshield with a towel. I can put up with having no ac, the heat from the transmission seeping into the cabin from my ripped inner boot, no powersteering, crappy wipers, but the defogger really worries me.
Now that I know more about vintage Japanese cars, I really want a carbed, smog-exempt car, since I do live in CA, the smog nazi state. And EFI really isn't much fun to deal with. So once again I am in the market, looking at 1st gen celicas, or perhaps a te27, or perhaps a 510 wagon. But I really want to know, how are defoggers in your old cars? Is this defogger issue just with Zs, or old cars in general? Thanks!