Just so you know...I used to have a set. Sit in the passenger seat and see if you think it feels higher than the driver's seat. Then consider the conversion brackets will raise the passenger seat a bit more...I'm going to guess 3/4" but don't remember for sure. As a tall guy, I didn't like sitting in the PS with the extenders in place. Plus, I'm kinda weird feeling awkward if the PS is positioned closer to the dash than the DS when empty. (Occasionally, I'd let my daughter drive it since she thinks it's cool too. But again, didn't like sitting on the PS at 6' 2" with the extenders in place.)
I don't have a family nor carry passengers terribly often so I ended up pulling them back out. Plus, I decided it's not THAT hard for younger people to get in the back -- which you'd normally PUT back there. I'm not saying they are good/bad -- just providing feedback before your purchase....in case it's beneficial.
2001 Ebony VX and 1989 Custom 383 Corvette