here is the problem I am currently in the middle of my engine rebuild. Im just about to install my main bearings but there is a difference in the bearings i ordered and the bearings currently installed in the engine. I ordered the bearings for a 99 si with the color chart (hadn't dissassmbled the engine yet) the bearings i ordered are grooved all the way around (both halves) with only one hole. The bearings in the engine currently are grooved only on the top half of the bearing and have two holes. Im wondering if there is a difference or if they are the same but a slightly diff design because of the year differences or because one is jdm and one is us spec. Im wondering if it will work and also if the colors on the bearings are the same for both applications. I really need help on this one. Thanks in advance.