Radio installation help!
If I was trying to do it on the cheap, I would cut the dash and buy a modern radio. Even the entry level radios have Bluetooth and handsfree calling from your phone. Here's one with all the bells and whistles for $89.
Kenwood KDC-BT275U
If your car is highly collectable, I'd build a little wooden box and hang in under the dash where you can easily reach it. My dash was already cut when I got it, so I didn't have to worry about that.