Question on shift kit

[Mark Brokaw]

A local Buick mechanic told me not to bother with a shift kit if the transmission is still shifting firm(which it is).I was under the impression a shift kit will improve performance and durability.
I guess my question is will it HURT to put a shift kit in?

Also, which shift kit is the best?

thank you.

 

[turbojoe]

I have heard good things about the original art carr hi-tech valve body kit. I'm in same boat as you (still on fence about gettin one).
JOE