[mattgouras]

Here are Rally IIs on a 1969 b-body. They are 15X7 Rally IIs dated from 1979. The paint on them is from the kit Ames sells (Dupont, if I recall).
The rally IIs have 4.5 inches of backspace.
The tires are 225/70/15s all the way around.
Previously, I've had 235/60/15s on the front and 255/60/15s on the back without any major issues (slight rubbing in front when wheel cranked all the way to the left and you hit a bump).
I prefer the way the 225/70s drive.
FYI: The Rally II center caps are the reproductions from our sponsor. They do NOT fit a disk brake car without modifications. I'm told the GM clip-style ones they sell do clear the grease cap on these cars, though.
Anyway, here's what this setup looks like.