Leaning Rear Wheel

["Bollinger, Bob D. (BODB)" <BODB@chevron.com>]

I'm currently shopping for a Spit and I test drove a '76 this weekend.
Overall it seemed like a great car and could possible "be the one"
except for two things which I think are related.

When I test drove the car it seemed to have some sway in it...kind of a
floating type feeling.  After the test drive I noticed that the tires
were low on air and also that the left rear wheel was angled in at the
top when viewed from behind (the right rear was perfectly straight up
and down).  The owner told me that he had replaced the leaf springs
himself.

My questions for the list are:

1) Why would the wheel lean and is this a major expense to fix?

2) Would the leaning wheel and/or tire air pressure account for the
swaying feeling while driving.

Thanks,   Bob