Oh man, not specifically, but it's the first few years. Not sure when they changed them to the one piece unit. That said, do think you can get a new aftermarket one that has a set of bolt on weights to accommodate the mag for around $100 from summit. Actually there are a few some less. Not experience with them but I know when my son rebuilds his, he'll get something better.
Here, is a short thread from when I asked the same question. This post in that thread shows a unit that was from 99 and has the 2 piece. My sons was supposedly from a 98 and had a one piece, which calls the year into question. I've never taken the time to verify the date if the engine.