I have a radio I bought on ebay and the seller didn't really know what it came out of but suggested a 55 chev car. I always thought the cars had speakers on top and trucks on the bottom. This one has the speaker on the bottom. It is a GM Sonomatic 12 volt model 981707 serial # 3k 8241. My truck is a 53 chev 1300. the radio is not a perfect fit but I thought I might get it working anyway. Am looking for info and manuals for the radio. Thanks.