I have a brand new DPI Platinum Track Ford 9", 31 spline, 1/2 tight differential for sale. I ordered this one to setup a spare diff with a different gear set, but it doesn't look like I'll be needing it.
Still in the shipping box from DPI, just opened up to verify that they didn't ship me a brick.
For those who don't know, this is a pre-loaded diff like the old T2Rs. Puts the power down better than anything I've ever tried and they are re-buildable.
Current price is $922, so how about $850 + shipping.
http://www.dpiracingproducts.com/products/...-1-2-tight.html