Can Someone ID this Nodular Case?

[Daddy4zack]

I have this Nodular Case and Detroit locker. Just woundering what it is worth? Why does the N look "lazy"? Is this the "N" case that everyone wants?? Its a 28 spline 3.55 gears.
Thanks
Aaron

[Delta 4 Wheel]

http://www.maliburacing.com/ford_9_i..._nine_inch.htm

This looks like a Daytona nodular...but you need to look at the inside of the case for the casting numbers...