If you have a 30 spline power loc or a 30 spline trac loc just change the side gears to 35s.
The trac loc is the weaker unit with just the single pin but you can still get the 35 spline side gears for it.
I wouldn't classify the track loc as weaker. I would say it's limited slip action is not as strong as the power lock for sure, but they're not weak. In other words, they don't break easily.