I just put a cat skid in my nytro with a 162. Thank you to SRXSRULE for all the input.
A cat 162 skid would be way to long. I used a 153 bolted up to the stock Nytro mounting holes and had hoped that somehow it would work with the stock 8" wheels but alas it will not unless you move it back. I went with the 9" wheels. I got my axle from
www.cecomponents.com I purchased theirs because in addition to going up 1/2" they go forward 1/2". You are able to turn it around as well so that it is actually 1/2" back which is what I did. When it was all done the axle was almost exactly centered in the adjustment slots.
The axle kit was well machined. The only bummer is they make their kits as a universal so I had to do a little filing to get it to go into the slots. A vice, file and about 10 minutes took care of that.
I added an anti-stab kit as well. I have stabbed a track before, not only is it not fun it is expensive too.