I'm going to put a 14bsf in my 88 K5 daily driver. I run no lift, other than a 1" zero rate in the back, 350 tbi with a 700r4...33's at for the street and 33" tsl's on the trail. I do a good bit of towing, either a flat trailer with landscape blocks to tractors and a 12' dump trailer with construction dibre and gravel. Future plans for my blazer include a slow build, but keeping the 33's for a while with no lift. What gears would work better 3.73's or 4.10's. Btw, I'm wanting to keep the 6 lug for now, thats why I'm not going 14bff.