From what I've read on this forum, the Saavy gas skid can be mounted with or w/o a 1.25" BL. Is the only reason for using a BL with this skid to tuck the tank up higher, giving the TJ a better departure angle? I'm going to install a 2" coil lift, would like to replace my 12-year-old rusty gas skid, but don't see the need to add another 1.25". I won't be going to 33" tires on a stock 35C, and the 2" lift should be enough to clear 32s. While I would like to install a Superior axle M35 C-clip eliminator kit, it's not an immediate priority.
Yep the BL let's it tuck up about as far as it can without the top of the pump hitting the tub. It also moves the tank into a better position, farther from the tracbar. The BL will come in handy later if you want to tuck your TC skid up too.
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DevilDogDoc gave the other popular reason for the BL: a tummy tuck. It's well worth the extra clearance, I'd go for it. Of course the beauty of the Savvy GTS is that it adjusts for either configuration, so you could run it one way for now and if you change your mind down the road you can readjust it.