I wanted to get some more information out as I have done some research on this and there is a lot of confusion on this subject. I purchased a Readylift 3.5" SST lift kit for my 2019 Ram Laramie Sport with off road package. The kit says it fits all Ram 1500's except ones with the air suspension. This may not be the case. I had my already dropped off to the 4WD shop to start the lift when I came across some information on this sight. I was given some good information from another member here that made me hold up the install so I can talk directly to Readylift.
I contacted Readylifts technical service department as soon as they opened. Readylift was very easy to get a hold of, as I talked to them three different times in under an hour. I appreciated the technical support.
I was told that they just recently installed this kit on a customer's truck with the offroad package and that it fit without any issues. They assured me that it should work on the offroad pkg trucks just fine, but then asked me to verify the dimension from the center of the wheel to the wheel well opening. If this distance exceeds 22" then they recommended that I do not install the pre-load spacer into the strut. I measured mine and it was 23.25" (this was after they claimed the truck they had in the shop was only 22"). As a result, I did not have the pre-load spacer installed. All other parts were used.
My truck with the offroad package was taller than I thought it would be and truly has a 1" lift from the factory. I have a few pics that I'll attach for reference of before and after the lift, as well as what the half shaft angle looks. The truck still has the stock tires and wheels, which will not be on after today. Here's a quick recap
* If your truck has more than 22" from the center of the wheel to the bottom of the wheel well opening, DO NOT INSTALL THE PRE-LOAD SPACER. My truck measured 23.25"
* All other components can be used.
* This basically gives you a 2" lift in the front and a 2" lift in the rear. Your rake will still be present
* My truck stance measures (with factory tires). Measurement shown is from ground to the wheel well opening:
Stock Front : 38"
Stock Rear: 40"
Lifted Front: 39.5"-40" Everytime I measure, it seems slightly different ( this is without the preload spacer installed)
Lifted Rear: 41.75"
The truck rides completely like stock and the rake is tolerable to me. I could always put a smaller rear spacer in to level out more.
I was happy with the feedback from Readylift but very disappointed that they do not have this information readily available or listed on their website. I am also disappointed that I purchased a full kit and could not use it. They also are unwilling to credit me anything back for the unused pre-load spacer. Overall, It still is a good kit and the truck looks and rides great. I hope this helps anyone else in the same situation.