8.75 brakes
I could be wrong, but I looked into converting to the big bolt pattern axles on the back of my Barracuda. I was going to get a new set of drums and have them redrilled to accept the big bolt pattern. Problem was nobody makes the 10x2" drums anymore to have redrilled. His suggestion was to convert to the 10x2 1/2 drum brakes.
If I remember correctly, he sells the 10x2 1/2 drum kit for $350. It would be $100 cheaper than the ebay ad linked above.