Just remember a cheaply built 9 inch is no better than an 8 3/4.
There is no way I would spend money on a nine inch rear end, no matter who made the parts.
I would spend money on a 10 inch rear end with a drop out third member as long as it had over 1000 HP with a high traction chassis
I remember when the Chrisman family was developing the Ford nine inch rear end for drag racing, they used the Dunn and Reath funny car as their test mule. Joe Reath told me that they had over $2300.00 in it back in 1972 or 1973, he also said they would take it out of the car and put the Dana 60 back in it when they where racing the car in Salt Lake City, UT
I didn't think to ask why they would change it for racing it up there
