Hi Guys just bought a 1988 Ford Econovan Truck and looking for some help but cant find what im after anywhere so thought id try here.

First Question i have a AM only radio does anyone know if these units are mono as there only appears to be one installed speaker? also how do i remove it ?

The face vents work fine but when i switch to feet or demist it doesnt fully change like it goes off the vents and i can hear it but it doesnt come out the demist or the feet vents.

Never seen one but most older stereos can be removed with 2 metal shims slid into the dash each side of the unit. The retaining clips each side are spring loaded so you need to insert something between head unit & dash.

Newer factory head units have 2 or 4 pin holes each side of the face. Insert stiff wire in all pin holes at the same time to release the head unit.

The vents aren't switching likely 'cause the cable needs adjusting on the heater box/core.
Removal of the glove box usually reveals the mechanism, or under dash. It's a simple cable, like brakes on a push bike.