In a '98 V10, the plug blow out problem has nothing to do with the plug breaking issue in later models. The first few years of the V10, Ford only machined a few threads for the plugs into the heads. In later years, this issue was fixed. There is a correct way to install the plugs and if it is done correctly there is little chance the plugs will blow out. I didn't read the article but I assume it outlines the correct procedure. While plug blow out happens more than it should in the '98-99 versions of the V10, it was by no means a certainty that all would blow out. I had a '99 F250 V10 with over 100K on it and never had a plug blow. If your mechanic isn't aware of this issue or the correct procedure to install the plugs, it is time to find a new mechanic.
