Differential questions on my IRS. Auburn pro or stock diff???

[stangman1]

Ok guys, I have my IRS out right now installing the complete Full Tilt Boogie Racing Kit in it. The car currently has a stock 03 cobra Diff in it right now with a 3.73 gear. I have a brand new Auburn Pro Diff in the garage on the shelf that I was going to use in my Fox. What diff would be stronger & best suited for my car? I am taking out the 3.73 gears & putting in a set of 3.55's. Car will be making @ 700-750 RWHP. I do a lot of street racing & some track racing in this car. I will be running a set if 26x11.5 ET Streets on a 15" rim when I am racing. Any info or advice would be greatly appreciated!!!!

 

[stangman1]

Anyone???

 

[Tractionless1]

I'm not familiar with the Auburn unit but if it's no a friction disk component like the OE and more like True Tracs (mechanical) I'd definitely go that route as you'll no longer have to maintain disks.