Hello new here been working on a 64 1/2 for about a year now put a 351w in and a 67 4speed toploader. Did everything thing myself so far. Was driving around today and I hear this buzzing under the Speedo sounds like when you first turn the key but wouldn't stop does anyone know how to fix this. I'm learning as I go. A list of what I have done and what needs to be done... New headlight and alternator harness tailights don't work and I do not have front turn signals installed yet thinking about buying a tailights harness aswell. Engine and drive train work well at the moment interior is original and beat up will need new dash pad new seat covers Speedo doesn't work I have aftermarket tach that work that's about it for gauges no radio headlights work stock alternator power steering headers customer exhaust come out in front of rear tires like the gt350 very fast still tuning the Summit 600 cfm I bought great carb by the way. Have the msd 6al box performer intake lots of aftermarket modified stuff just slowly fine tuning very happy to be apart of this forum looking forward to talking to some other mustang junkies on here thanks...