Well after my 2nd 740 radio started to crap out I finally bit the bullet and installed an aftermarket radio. Took me all toll a have a day but I wanted to do it without cutting and splicing wires. I bought a connector kit on ebay along with the faceplate adapter. I was lucky as I purchased the Green book electrical manual so it had a diagram of the radio and amp wiring. What was interesting was there was 1 wire for the front right speaker that was labeled wrong in the book but I managed to sort it out. I did find a shop down south that repairs Volvo radios but the starting repair price is $200 before they find the problem and then additional costs for parts and labor. I also have an extra Amp if anyone is looking for one and I'll let it go for $30 + shipping if anyone is interested. It's a 1989 740GL with a young 360K miles on it so if we make it to 500K I may get it restored.