Their lifts (and others) are designed to achieve advertised numbers after adding the designated load, most of which is toward the rear, and OME kits are also known for that “stinkbug” stance. For example, I have their 3.5” J kit (863J rear, 850J front). Unloaded, the rear is an inch more than that, while the front actually seems low. I have a 2” front spacer in order to be level, without any load (confirmed with tape measure). My truck came with this lift & I’d like to lower it a bit, but that’s a different story. Many people “mix” OME springs for this reason. Ex: for a 2.5” heavy-load lift, you might go 850J front & 863 (non-J) rear, due to the rake. Even that may still have a rake on a stock 80.
There’s tons of info on this forum (check the FAQ & there are specific OME threads), and I also highly suggest doing your searching via google - keep the terms simple and add “ih8mud” - the search function on the forum isn’t always great, and I’ve had much better results doing it this way. Keep in mind to check the “see more results from [website]” drop-down option on a google search, if it’s there. I often expand those results to find my answer.
I’m certainly not a suspension expert, but your shocks aren’t going to do it. Without adding enough load in the rear, or changing rear springs, the only way you’ll get level is a front spacer. If you’re cool with the rear height, adding a front spacer is no big deal. If you’d prefer to drop the rear, you’ll need different springs. The job is not very different overall.
Which springs exactly, and what is your truck’s setup? Stock, additional cargo, bumpers, etc.
Along with spring #s, can you give us current measurements? Center of the axle hubs to underside of fender flares.
