Well i have just bought a metallic blue 1973 164e for $100.00 cdn. The rust can be far reaching, check under the battery tray and the hood hinges and were the fenders meet at the front of the car. You can buy aftermarket rear wheel arches for this car really cheap ,but it is the time required to have them installed that can be horrendous. My one word of advice is make sure that you do a compression test because the cams in 73 and 74 are notorious for going flat. As you can read in recent comments how much of a pain in the ass getting a cam for these cars can be. But in the long run when it is done and your cruising at over a 100mph (not that any law abiding volvo driver would ever do that speed) you will love it.best of luck adotbdot.