[MENTION=199958]1biker[/MENTION] I did the '01/'02 retrofit in to my '00 so I could add top tethers. You will not get LATCH connectors, only top tether anchors. This means you will need to install your car seat with a seatbelt no matter what type you are installing as they did not add LATCH until '03. The tether anchors for the outboard seats are located on the back of the seat and the center seat anchor is located on the hinge in the center that acts as the middle pivot for both seat backs.
'01 hinge left, '00 hinge right
So first off, what kind of car seat are you installing? A rear-facing only infant seat, convertible seat, booster? And how many (Twins, more than 1 kid, etc)? Will there be more than the child in the back?
The top tether anchors only help for forward facing seats since the majority of rear facing seats do not utilize the top tether (Britax had seats that used top tether for rear facing, but phased them out for anti-rebound bars).
To retrofit, you just need the upper part of the seats and the hinge. To make it easier you would get the carpet and backing panel too, but it can be modded. I got seats with cloth seat covers, so I took my leather covers off and put them on the new seats.
To get the back cover off, pop off the panel which uses plastic clips that are attached to the slightly-stronger-than-cardboard backing
If you have to swap seat covers, undo all the hog rings:
then pull back enough to squeeze the tabs to get the guides out for the head restraints
Pull off the covers and switch. You can switch the foam too if the new seat is in better condition.
To mod the back panel you need to measure and cut where the opening will need to be. Just cut deep enough to cut the board but not the carpet. Once the hole is correct then cut an X in the carpet and staple back:
and then when attached it should look something like this, driver complete and passenger not:
Easy peasy. Was it worth it? I think so. It didn't cost much, didn't take much time and using a top tether on a car seat helps a lot during a crash. In addition some car seats require, not just recommend, it for proper install. An example would be a Britax Clicktight Frontier requires it for kids over 65 lbs when using harness.