Swapped in some seats out of an 89 H*nda CRX over the weekend. I had these in my 240Z but the seat height there had my head too close to the ceiling and just never quite felt right. In the tracker the seat height worked out to pretty much the same as the originals.
What a big improvement. They're not a spring supported type like the factory Tracker seats are (the CRX are just foam on a steel sheet frame) so you do feel road bumps a little bit more but it's a cushioned firm feel not harsh. Even still, they sure are more comfortable. Because of the goofy arrangement on the stock mounting rails in the tracker with the outboard ones being 3.5" longer and on "stilts" compared to the inboard rail, it was a little more involved, but it turned out pretty nice.
I (should say we, my friend helped a lot too) had to fab a riser out of some 1.5" square tubing on the outboard ones, but all in all it was pretty easy. We kept the factory slider mechanisms underneath the 1.5" tubing so the front/rear slider adjustment is still there.
I got a couple more inches of legroom too (other tall people take note) and the new seats have a more even amount of support across the back of the legs since they gradually raise toward the front. The old seats always felt like they almost sloped forward to me.
There's only a couple things to do still. First I need to grind a few more notches into the reclining ratchet mechanism so it leans up a smidgen further. It's not bad as it is, but the furthest forward position is still leaning back a little more than I like it to be. Secondly, the upholstery doesn't match since the CRX seats I had are blue. Honestly it doesn't look that bad with the gray interior but I might have to look into reupholstery or some seat covers.
The additional benefit of the way we made the seat adapters is that they now have a flat even top surface so adding any other aftermarket seats down the road would be much easier.
The only materials we used were about 8 feet of 1.5" square steel tubing and about 1 foot of some 1.5" x 1/4" cold rolled bar stock. The tubing we used is some 11 guage stuff that my friend had laying around, you could probably use thinner wall material and be fine, but this stuff is absolutely burly and made for a very solid feeling set of adapters. It was a little overkill, but what's an extra 2 or 3 lbs when you consider a solidly mounted seat is going to protect you if you're rear ended.
The inboard side is just the 1.5" tubing bolted to the original slider mechanism. This made for a factory seat height. It's probably not exact, I didn't measure, but sitting in the old seat and the new seat I could fit four fingers between the top of my head and the front edge of the B pillar/Targa bar/whatever it's called in a soft top tracker. So if it's not exact, it's witin about 1/4" or so anyway. The outside is the 1.5" tubing bolted to the CRX seat and then we made legs down to tabs made of the bar stock with more of the square tubing and welded them in.
If you've got a drill press, chopsaw, welder, the time, and can find some CRX seats at a junkyard I'd highly recommend this swap.
You might be able to use other seats too, but there's a couple reasons the CRX seats are a good choice for an easy seat swap. First, they're fairly easy to find, if you want even bigger and better side bolsters, I believe the CRX Si seats are more "sporty". Second, they're pretty lightweight, by themselves I'd say the seats are slightly lighter than the factory Tracker/Kick seats are. (adapter rails are probably 7 lbs or so per seat) Third, they're an excellent match widthwise as they're only 1/2" or so wider than the stock seats are. Fourth, the CRX seats have flat evenly spaced holes on the bottom to bolt them to adapter rails which makes them a pretty good "universal" replacement type seat. Just four threaded bolt holes on the bottom of the CRX seats. 12" centers front to back, and they're also evenly spaced side to side. (15.75" if I recall correctly)
If anyone wants some more info let me know and I can give you the dimensions for making some adapters for yourself.