No on the torque tamer. I use it on the street and not really driving it hard. As far as the springs, I talked to them and told them how mine was built and they recommend for it depending on that. 23 gal tank, rear tire carrier etc as far as weight for the springs. Make sure that if you have mixed year parts on yours that you let them know. I have a 66 but have a 76 front axle and it required a different steering length and arm.