The one in the picture above is the non adjustable version. Some people like to fine tune their shift points with the adjustable version. The non adjustable version is the lowest price out of all of them. You could get to it from the bottom since you a lift. Be prepared to start cutting rusted exhaust bolts. Get spare bolts, flanges, nuts, high temperature silicone, and anti seize in addition to the modulator. You might want to check the condition of the heat shield around the modulator, and the servos. You could replace the 2 servos at the same time since everything is going to be removed at the same time. Use Vaseline on the modulator pin to keep it from falling out during installation.