Earlier this year I had my daily driver 1990 D150 Ram PU at the track, and it has no tach., I shifted at 60mph into 2nd and 100mph into 3rd and went 12.12 at 109mph 3 times in a row. It had 3.55 gears. Now with 4.10 gears I tried 52mph into 2nd and 90 into 3rd and was between 12.01 and 11.93, with the mph varying between 111.3 and 112.2, on 7 passes. Truck has a 410 sb mopar engine, and weighs 4300 with me in it.