Hope this topic has been beaten to death in the past. I'm rebuilding my 727 behind a mildly worked 440 in a few weeks. Mostly street driving and some performance use. I've read positive comments about installing a shift kit. But, I've also read quite a few help posts from guys with less than positive results. In fact, the guy I bought the car from put one in and took it out but wouldn't elaborate why.

Opinions appreciated along with any pitfalls to avoid?