Im having trouble on what to do... I have an old '79 pickup and we took out the old radio cuz it doesnt work anymore.. we thought about putting in a new radio but i dont wanna have to cut the dash or anything (its a fairly small rectangular shape with both sides having holes for the knobs) cuz its metal and i hate cutting metal without proper tools.

So my idea was to just find a method to put in an amp and hook it up to the speaker and use an mp3 player for the music source..is this feasible? and anybody got some better ideas that are relativlely cheap??