Seat is repaired and in place, finally! The Sparco GT sits +\- 3”-4” (eyeball guesstimation) back compared to the stock seats, which means the LNR seat extensions will get returned. For reference, in the pix, both seats are locked all the way back for depth comparison.
And as far as height difference between stock and the Sparco, IMHO, negligible, if any, maybe 1/2”-1” MAX.
But man, what an immediate and noticeable improvement. Legs/quads support isn’t too pronounced to make pedal play affected at all. In fact, slightly improved by keeping legs more straight forward and aligned with the pedals.
The BIG difference is the torso/lat support. I’m 5’9” 180lbs and on the slightly portly side in the midsection. Hey, I like beer what can I say?! These bolsters fit me perfectly! Can’t wait to throw it around some twisties

The last pic is me trying to reach across to show you the perfect fit along my torso area. Not sure it translates, but…