I put a pioneer in my 86, got the stereo & adater from best buy, It fits and looks great, doesnt extend too far out. I changed my antenna also, using a Pep Boys power antenna. I modifed the antenna relay so that the "logic" was correct for the new antenna. I did not change the speaker wiring, I removed the speaker/amplifiers from the doors and rear speakers. I made my own brackets to install new speakers. Anyway the stereo sounds great.