I have completed the Rubicon 5.13 axle swap into my Willys today. It all went off without any complications and I'm happy with the job. I realized 2 nights ago I had the wrong Dana 44 wire harnesses and had to order the correct ones. So I'm still waiting on those to show up but the wiring into the Lasfit switches won't be a big deal. The 5.13's are so much different than the 3.73's. I actually see 8th gear now!! Lol. 37's will be next. Other than a 4:1 transfer case and electric disconnecting sway bar, my Willys is now essentially a Rubicon. All the Rock Jock hardware was installed with this build. If anyone is considering Rock Jock, they make fantastic products that would stand-up against anything else on the market. But their instructions are HORRIBLE!! That's because they don't have any for a large portion of the products they sell. I installed a front track bar relocation which required drilling a clearance hole and assembling a multiple piece assembly. Not a bit of instruction on how to install this. Not even a YouTube video. Luckily I'm mechanical and a wrench turner and figured it out but it's frustrating that products that cost so much don't include even basic instructions. I actually ended up looking at the photos of the part on their website to see how it was assembled. But if that's the worst that happened i can deal. It went well.