Daily driving an A-body

This is EXactly what I'm looking for, an A body or B body that I CAN use as a daily driver!! Slant 6, 273 or 318...no need for A/C, probably have to avoid the Hottest summer days. It has to be a car I can drive in the rain too, ie, no leaks!

I've owned a 67 Chrysler 300 'vert for almost 6 years now. The original owners had it repainted, bumpers replated and a new convertible top put on circa 2002. The interior is the original leather bucket seats and still in good condition...Car made a great 'cosmetic' appearance when I bought it, but there were a lot of mechanical issues...I won't go into that here, but they've all been addressed and now the car is a delight to drive.
It's not my daily driver because it has all the performance goodies: 440 TNT and all that, so fuel economy is a definate consideration. My other issues is that I have leaks into the back seat floor area when it rains. Until I can address that, I don't drive it when it rains.

NOW, I'd love to have an old Mopar as a daily driver...as I mentioned above. Still keeping the Chrysler of course!!