I was writing a order will driving.

That wouldn't surprise me.:D

Yes exactly the reasons I voted 9 inch over 12 bolt :thumbsup:

call kyle at dse . go with the 9 . quada link.
rick k

Moser 12 bold 33 spline eaton posi https://www.youtube.com/watch?v=zn3K6d_e7bw
https://www.youtube.com/watch?v=7Dp0PngisVI
do road racing high speed runs had it up to 190mph!! beating a Aston Martin Vantage. never scipt a beat nore thuse it makes noice hell done 5000 ml of trashing didnt even changed the oil. ones. il buy another one for my 69GTO :thumbsup:

I think it is odd but when I got my Chevelle couple years ago I thought about a 9 inch rear axle but went with factory 12 bolt and 33 splined axles like a year ago. Now this post pops up and guess I made right choice!!!!

Franks post about Power loss in the 9 inch is real great info!....

Another thing I read somewhere is the position of the 9 inch yoke can cause some Driveline angle issues when doing LS/t56 swaps....

Any truth to that? :question:

Actually in some super low cars the lower pinion location can be you friend. But in a stock height car it can increase the driveshaft angle a bit. Probably not enough to cause a issue though

Like every car on this board. A lower pinion means less working angle and a smaller breach of the tunnel. I'll still take my 12 bolt. Me want as few Ferd parts as possible. :unibrow:

I choose 9"
 

I choose 9" because parts are easier to find (when in need), more race cars use them so more development on things occur for them meaning more options in the future, more options on brakes, rotors, axles, etc, and most of the parts for them do cost less in the end.

Sure there are a few companies that specialize in GM rear parts that are as good or maybe even better than the Ford 9", but they are just that - specialized parts.

Coming from a racing background, I know I would much rather have parts available from the local parts truck, or a good probability someone else there has spare parts that will work. That's just how I think.