I've got a 86 4x4 that I put a tbi 350 out of a 87 in, I never installed the speed sensor and I'm trying to get it all hooked up write. I also only have one tank since I could'nt figure out how to get a return line for the tank I was using. I still do have the 87 and I'm fixing to pull it out of the woods, pull the tanks and see if I can use the valve and all the lines out of it. I've got a inline pump on it now and i just don't like the sound it makes. Anyone know how I can get a speed sensor to hook up to a 86 model 700r4. This truck has been sitting for a couple years and it's time to get it back on the road. Anyone know if the wiring harness for the fuel pumps to the tanks is easy or hard to get out?