My 283 didn't even have a balancer at all. A standard balancer will do fine, I suggest you get your crank drilled and tapped so you don't have to bang it on (interference fit sucks big time when you have to use a big hammer, I didn't know any better and didn't have mine drilled and tapped).
The timing tab might be in the way. Mine was. Part of it was designed to break away easily, the part of the tab that was further from the crank was still too close. I just bent it a little back to about a 45 degree angle. That way it cleared the new balancer and I can still read the tab markings when I set the timing.