I would add that being aware that the S&S is a torque monster and treat it accordingly. At start up it goes from zero to 100 foot pounds and that wacks the front frame in a big way. There is no way around it. I totally agree with planenut that if it doesn't get driven it won't break. Mine finally went when three cracks at the front developed. It started with one but it then cascaded like dominoes. At start up that engine is trying to leave the building. I'm more than convinced that the start cycle is the culprit as just running the engine at normal revs smooths the vibrations down to something reasonable. Driving the car, even with potholes will not introduce the forces necessary to crack the chassis compared to the start cycle.