8 3/4 Trac-loc?

I've seen those blue marks on several sure grips and it's never been a problem. Not saying yours doesn't need taken apart and checked. That's always a good thing to do. As a couple others have already said it'll fit into any 8-3/4 case as long as you use the correct side bearings as their different on the clutch type to the cone type. And the correct term for the one you have is the power lock sure grip