My seats are so uncomfortable !!

[michel schryer]

The seats that I've got with my kit are sooo wrong. They are made so tight and I'm 5'6",135 pounds,imagine my neighbor try to fit in them,no way.
Also the back is curved so much that there's no lombar support,because of the curve it creates a big gap between my back and the seat,hurts the back.
They have to be re-upholstered for sure,at least the back,there's no way I could drive this car for a long trip. Do you guys know if the frame is easy to manipulate,bent. It has to be straighten up a bit so my back is not so compressed from the side. I'm a small guy and I feel so tight in there,way too cramped. I know they are suppose to be supportive but not like that. My wife also complained she had a sore back after a short drive,I hope it's not going to cost me too much to fix the problem. Anybody had a similar problem.
I don't know who made them,were just supplied with my kit,any ideas how they are constructed before I start ripping them apart,cheers

Michel