DBrown wrote: when you are looking at these kind of upgrades you need to understand what it changes and investigate which mod gives the most benefit. for me I will choose the wristed arm, it cost around $30 .
Yep, you need to understand what's happening with the suspension. More is not better.
As is, with a wristed arm, it creates a lot of bind on the track bar and eats bushings, it maxes out a 9012 shock, it maxes the u-joint angles, and it stretches the coils to the max. Basically, any more flex and you'll open up a can of worms, in which case you would be far better off building a 4 link from the ground up.
A simple wristed arm is more flex than you know what to do with. I rarely pull a front tire. The beauty is all in the cost. Guys spend thousands on custom suspension to get similar performance. A wristed arm can be built for less than $50, or bought for around $250.
In regards to the axle housing mod, I don't like it. #1 you're hacking a pefectly good housing. #2 you loose precious ground clearance in a critical spot. #3 it's expensive. #4 it's a lot of work.
In short, if you want more that what a wristed arm has to offer, put your money into a ground up 4 link, coilovers, whatever....