[dmack91]

I just converted a stock AM radio to Bluetooth using one of these from Amazon for $18.

ZK-1002L 100Wx2 50W 80W 5.0 power amplifier board

I gutted everything from the radio except the two knob assemblies. Then removed the rear section of the volume knobs rheostat, which left a shaft I was able to file to fit the bluetooth volume shaft. Mounted the Amp to the factory case (lining up the shafts to work without binding was the worst part).

Tested it with a spare battery and some ancient speakers and sounded good. Took about 4 hours of tinkering.