I changed over to a 3.55 gear and swapped the speedo gear based on the chart that Resto50 had on their site. While driving to the track(roughly an hour and 15 min away) I was doing 60 by my speedo and a few buddies behind me called and asked why I was going so slow, turns out my speedo is rougly 9-10mph off. With most of my trip going to the 1/8 and 1/4 track being mostly highway I need to get it fixed. What if I put the stock speedo gear back in, would that make my speedo read even faster or slow it back down? I have a 275/40/17 on the back, not sure how much of a role the tire plays in this, but I figured id point that out. Thanks