Installed my Tiburon seats this weekend.
They're much more comfortable than the stock seats, with one caveat. In order to get them low enough that a 6'3" person like me can sit in them comfortably without hitting the ceiling, they have to be installed off-center a bit.
The Tiburon seats are actually offset already. IIRC, they are off-center by at least an inch and a half.
Here's a picture of the brackets.
I thought I had one of the seats too, but I guess I forgot to take one. I can get one of those anytime though if anyone is interested.
Anyway, We decided to make the brackets out of 12ga steel. We were thinking about using angle iron but the 12ga "test piece" seemed more than strong enough when bent to it's shape on the brake and after the front end was bent and welded to the contour of the Tiburon seat. You can't see it very well in the picture, but the front (towards the left) hole of the bracket is on an angle. There are nuts welded to the bottom of it.
Being a bit off-center from the steering wheel is a little weird at first but I'm getting used to it. Like I said though, still way more comfortable than stock.
If you're short, you could move the seats away from the tunnel and get them closer to center. You'd need to move them about 2" further up in the air to accomplish it. You also may not be able to use the stock seat belts, which I retained in my installation.