My tires are the KM2 and they are 37x12.50x17 I just got back from a rock crawling trail with a team of jeeps and the BDS lift and tires performed like a champ, tons of traction.
I would recomend the BDS to anyone that does even a little bit of offroading since the kit is basically a skid plate for your engine, nice thick thick steel. Actually hit a couple of big rocks and its hard to tell where it happened.
Also I have towed and been offroad with both and have had zero problems.
Yeah he used my strategy code (on the order form and talked to him on the phone), I have the 87 & 93 performance and used 1 tank on each. I definitely did notice the improve throttle response on the low and high bands but you get more bang with 93. My MPG have gone up about .9, I think because I get better city miles now (avg 16.9 before now 17.8 and thats 2/3 hwy 1/3 city).