Considering the age of your car and how many miles that are probably on it..
You should be looking into something more than just a $100 Transgo SK or JR Shift kit that only corrects how the Transmissions shifts or feels while driving it, because those kits Do not increase the strength and reliability of the transmission ..
You should be looking into the Larger Transgo HD rebuild kit or Sonnax Kit's those are the kits that replace alot of the failure prone parts in these transmissions..
And even those kits do not come with everything required to make a nice reliable race transmission..
You should also be building it or setting it up to correct how it feels with a upgraded Torque Converter..
You can set it up one way and then when or if you get a Higher stall Converter depending on the stall the transmission will feel like a slush box all over again..
Along with being careful how you set-up the 1-2 shift, just because it hits hard into 2nd won't exactly mean your cars is any faster...
If you consult Transgo and or Sonnax they will tell you the same thing..
Unless you have documented records on the maintenance most places depending on the mileage on your car and transmission WILL NOT install just a Shiftkit just because of transmission liability issue's...
You can find out everything you need to know about your transmission right here
http://www.transmissioncenter.net/700r4.htm
And here
http://www.transmissioncenter.net/competition.htm