i have a '63 belvedere i drive every day. i kept breaking speedo cables so i thought it was the speedo itself that was breaking them. i cut out the back and bought a speedo from the bay. also, it turned out i needed a cable and housing. can't go back. it only went to 80 mph but that was fine. it wasn't accurate, as the rear gears and tires had the car going 70 at 75. enter a new pumpkin with 3.55-1 from 3.33-1. now it goes 62 at 80. here is my question, the needle will go all the way to almost 0 again when the pedal is pushed further. is this going to break the gears or brake off the needle or what?