I bought myself a 1951 Ford Custom not long ago and had a question. When I'm driving around 45 mph, I get a vibration. Don't get it at 50 or 40 just at 45. Also, when it's parked and I rev the motor, I can get the same vibration. Is it possibly the clutch assembly or an unbalanced flywheel? Or is it maybe in the motor itself? It is a rebuilt 239 flathead V8 with low miles. Runs great otherwise.













61 F100 292.







51 Ford Custom