So a LBS mentioned 2 big improvements he can make for my '70s - era Schwinn LeTour.

First would be wheels. (yes I still have the old steel ones). Anyone know a good place to get inexpensive but sturdy aluminum 27" wheels?

Second would be the bottom bracket. What do I have to gain by upgrading this? Does anyone sell a kit for my bike?

On the obscure side - in eyeballing my bikes it looked like my 700c wheels would fit on the old steel bike since the brakes seem to have room to move down some more. Am I wrong?