Steering Gear, AC-Delco vs. ACDelco

[Maic]

So,
Since times and suppliers have changed, what steering gear(box) should i buy.?
I bought an 04 kon XL, 1500, 2WD, 5.3L vin Z with 253K miles and looking for a new/good replacement steering gear(box).
AC-D...... is now ACD.....! Any good pointers for me please?
(best i found this time was at www.GMPartsDirect.com).
Any other input for an newbie please?
Thanks suckers. smile.