As for your steering interfering with the gusset, show me how with pics. Gusset from Marlin goes on the top of the housing and there should be no problems. Only issue I can think of would be the torque rod tower. You're going to ditch that anyways. '79 was the only year w/out the factory gusset. Started the factory reinforcement in very early 80 trucks. My 80 come with it.