The cool thing about the Kirkey seats is that they are relatively cheap [about $250 from Summit], they are light [didn't even bother to weigh them], and they are easily modified. We cut down the side of ours for the 33 because the trans tunnel and door panel did such a nice job of holding my fatt butt in place. This allows me to insert myself into the seat without dragging "vital parts" over the edge of the seat side
The down side to the Kirkey seats...ugly Kirkey padding is extra...pretty custom padding is really extra...the fixed back design allows no easy access to rear seat...and you get to fabricate your own mounts and sliders.
They were an obvious and successful choice for this car...couldn't imagine using anything else, especially after Tracey got done with them!