[vujade]

you would narrow your rear suspension for 1 of two reasons:

1 you want to run really wide wheels under the stock rear fender

2 you want to run a wheel with very little offset.

Unless you want to do one of these two, I dont see the benifit to narrowing the trailing arms.

With the right wheel offset, you dont need to narrow your suspension, but sometimes you may even have to run a spacer to bring the wheels back out some like I did.

I am running 7" wide wheels in the rear with a 10mm spacer because of the wheel offset I chose I needed to bring the wheel back out some because they were hitting the suspension.