why a Ford 9"?
Blownfish, the rears have been tested and the articles have been written..........but by all means, believe and run whatever you like. The extra weight had little to no effect on strait line performance.
I do not agree with you on your reasoning of why the 9" is most popular. Just look at the production numbers. Do you really think the people that are running 9" fords would be running them if they were less abundant or even more expensive? I don't. Do they have a good rep? Yes, but generally in built form. Stock they are good, almost as good as a 8.75" mopar rear. The 8.75" is not trying to push the pinion out the front of the case like the 9".
There is a difference in pinion location in relation to the ring gear...that in itself probably makes more difference than anything, especially efficiency. That is why the 9" has an extra bearing and why the aftermarket is littered with "better" pinion supports for a 9".
