I have been looking at the BBK long tubes myself. I hear you replace the factory manifold studs with bolts. I would prefer the studs,for better clamping force with no loose screw problems.....You only want to do this job once! Hey,with those 3.73 gears,you must have been blowing the tires off at the strip. If I do the gear change,it would most likely be to 3.55s. Better street performance is my goal here instead of a killer drag car.