When the 7.25 open rear breaks, usually it's the spider gears. A Sure Grip helps to spread the load and allows the spiders to live with a hot slant six or mildly modified 318.

Both the clutch and cone 7.25 SGs were produced, both are hard to come across.

I've seen people post that Randy's has new SG units, but he doesn't, he only has the R&P sets.