Mudhog,
Are you totally sure? You're looking at it from the back forward, right? Just asking 'cause I've got a 203 in my rig and a 205 sitting on my garage floor, and if I remember correctly, they've got the speedo cables set up just like the page says. I'll double check tonight, but I'm certain the results will be the same.
It's not what you buy, it's what you build!