I am in the process of replacing the water pump on my 1988 780 v6. When I got the new water pump it came without the back plate, so you have to swap out the old one. The back plate is held on with 4 hex bolts, which were a bugger to get off. When I finally got them out, I noticed that two of them have aluminum stripped from the body of the old water pump. At first I thought the bolts were stripped, but it appears that only the threads in the old water pump body are stripped. I checked with my local Volvo dealer and they say they can't even order the bolts. My questions are: 1. Has anyone else ever had this problem? 2. Is there any reason not to just get an ordinary bolt of the right length and threads per inch to replace these? 3. Is there a source for these bolts? Thanks in advance.