In my opinion, any power loss by virtue of using a Ford 9" vs. a 12 bolt will not likely be noticed while I am driving the car.
I'm not afraid to admit that I simply do not have the driving skills it would require to actually miss that little bit of difference.
Frankly, I am more interested in minimizing the chance of failure due to extra stresses my less than perfect driving skills can impose on the system.
In addition, the original factory 12 bolt went to a very appreciative new owner who was looking far exactly that piece. It wouldn't have been right modifying that unit.
While we're on the topic, here are some pics taken during assembly of the rear end.
We ordered the 370 ratio, nodular iron, 9+ unit from Currie.
Of course the 3rd member was shipped with the set up grease still in place so we could observe the contact pattern. Kevin and Trevor have set up quite a few of these. The pattern looked good to their experienced eyes.
After carefully preparing his work area to prevent contamination and scratches, Trevor began the assembly process.
This shot shows the relocation of the Currie emblem and one of the tow strap attachment points V8TV added for convenience.
Currie axles and Wilwood emergency brakes installed:
Finally, the Wilwood "floating" rear calipers were installed.
Can't wait to heat those up a bit...