I just converted my big block cobra from a toploader with a 3:54 gear to a TKO and a 3:73 gear.At road speed the screaming engine will wear on you. With the new setup,getting out of the hole just about takes my breath away,and out on the turnpike clicking into 5th is a true pleasure,1000rpm drop.Not to mention that if a little horse play is in order,and mind blowing acceleration is only a short positive throw of the stick.Honestly, it is very hard to contain the excitement.