I took a JK with 37's to Silver Lake this weekend.. It'll stuff those 37's right up in the well no problem.. Just had a problem with the tire rubbin' the stock rubicon rock rail.. But with a little modifing that problem will be resolved soon. I also took a look at a JK that SandyKorners had there with your 3" lift on it.. They only had the stock Rubi Tires on it but your lift looks very good and nice to install.
Oh and with the stock Rubi gearing and the 37's man that v6 is strugglin' On the E-way you have to leave OD off ..