89 radio

[Beefcake]

hey guys,

I know this has been discussed before. But I thought Id ask incase something hasnt been covered.

I want to install a new radio in my 89 silverado. Problem is its hard to find aftermarket radios for this small space in the radio's current location. Id like to keep the same location.

So does anyone have:
wiring diagram of the wires pertaining to the radio.
a good aftermarket radio that will fit this location.

thanks!