I have a 71 Big Block Chevelle. I rebuilt the front end and changed from drum to disc brakes. I have a vibration in the car at about 55 - 60 mph. The vibration is not real bad - just enough to vibrate the hood and passenger bucket seat. I have put new tires on the car, new wheel bearings, new rear u-joint. The car also has new transmission and torque converter. Any ideas on what to look for would be great. Also, I took a set of rallies off my Dad's 55 and I still have the same vibration. Thanks for the help. Michael

I'd check the u-joint installation.