What speakers do you plan to use?
Are you using a factory Stereo?
I have a factory AM/FM radio in mine. Does it sound good like today's?
Heck No!
It sounds like a radio in 1971.
Scratchy and fading signal since old radios can't lock on since they're analog.
I really don't care because I didn't build the car to listen to music. Listening to the engine is more fun.
Here's the place I bought my repro speakers from.
http://www.turnswitch.com/speakers.htm