8.75 or Ford 9”???

You could well be right. That's a good point. I think they are really close in strength. But still the 9 inch is cheaper to build......unless you find a good dude like Roy that will sell them fair. I was real fortunate with the 9 inch I have. One of my customers at work just walked up and said "Hey Rusty, you want a Ford 9 inch for free? Come get" so I did. LOL
Free is ALWAYS the right price!
I had a couple of friends in the rearend business, that used to scrounge rearends out of the boneyards, back when not everyhting was fwd. They specialized in the nines (they were both ford lovers) but would snag anything they could malke a profit on, or had a buyer for. They taught me the ins and outs of the nine, what to get, and what was neccessary to make them live , cause they built them for the local racers. Kinda why i am partial to the nine, i guess. They did get me a great price on my 8 3/4 locker, and put it together for me too.
It is a shame, one has retired, and quit racing, and the other passed young from pancreatic cancer. I sure hope i dont go THAT way!