Don't do it.
Yes...it will provide about an inch more drop, but, on these trucks, anything more than a 4" drop requires notching the frame.
One of the worst things I did to my '98. I was going for that extra 1" drop to get a 4/7 drop. A 3" difference Fr>Rr is what these trucks need to ride level.
The over-load provides progression during suspension compression.
Without the over-load, I'd blow through the suspesnion travel & the axle tubes would be kissing the frame. ...and I even had an additional spring made-up to replace the over-load, but curved in the same direction as the rest of the spring pack. Nope. Wrong. Didn't work.
You can see that fabbed spring in these pix.
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
So...I yanked that POS out & replaced the over-load & got the 1" drop back with a drop shackle.
Which you can't do, obviously due to the 4" drop already maxxed out on the shackle.
About the only way to get a 5" drop is to do a flip kit & then use a short shackle that would raise the 6" attained with the flip back up 5".
Those short shackles are available. 4X4 guys use them.
With a 5" drop, I'd highly recommend the shock extenders.
With a 5" drop, you would still HAVE to notch the frame, & maybe the box cross-member, too. Wouldn't have to be a notch from a kit. You could fab it out of a piece of 4" round tube stock. The backside of that would require boxing the frame to support that notch.
Done this way, you'll have to replace the drop hangars with the stock ones. Hope you kept them.
This is why I'll never do another 2/4 drop!
It's NOT low enough.
The install, with the box on, was an excersise in frustration.
And...It's NOT low enough.
Getting the pinion angle dialed in was a pita.
My blue '97 is at 2/4.
As soon as I pulled it outa the shop, my first though was...
It's just NOT low enough!