Originally Posted by blazer_4.3

figured i would chime in on this one. wheni first got my car i felt like dong a top speed run and it wouldnt go over 140. it would get to about 135 and then the needle would barley budge from there. did it like 3 times on different occasions, and just thought that, that was as fast as my car was. oh well. then i ran someone else and he was a car back the entire time. and he was doin 153, i let out first. so at that point i realized my speedo was out. or atleast not to accurate to say the least. since then i havent done over 90, lol.

Originally Posted by med_reject

Unless you have nitrous or forced induction, you wont pull 4th gear effectively with 2.73 gears. Even a cam would shift the rpm at which peak torque occurs with insufficient change of max flywheel torque to achieve the potential top speed. Get 3.23s and you should be able to hit 165mph, at around 5300 on the tach, which will be right at your power peak. You'd get more acceleration with 3.73s, but you'd over-rev in 4th (hurting top speed) unless you change the cam to shift your power peak accordingly.