Car idles fine and runs decent until about 3000 rpms where a vibration is felt through the pedal and car. I have a tubular k member and other than that everything is stock. One thing that was weird about the k member I got,was that we had to shave half of the bolt off at the top so it would mount onto the car. also we had to pull the steering shaft out to meet up with the rack&pinion. I didnt think much about it at the time cause I didnt know much about cars, but as I have had this car for 11 years and it never been right the whole time it makes me wonder. We put a new flywheel, new clutch,new dampner and all with little to no progress. My thought was that because the geometry of the car was moved forward with the k member that seems to be wrong could the driveline be not all the way seated in the tranny? I dont know please help me so I wont leave Mustangs forever thinking that they are cursed.