I think your going about this the wrong way. Have you ever weighed the stock seats with all their motors. I have. Just over 100 lbs each. My next performance upgrade will be Tillet seats.. 11 lbs ea. Now if I could loose about 65 lbs of my EXTRA ballest Id be all set. I did this in my Maserati TC. Their seats were 150lbs ea. Purchased MOMO seats at 25lbs each. 250 lbs taken out of the middle of the car .Completely changed the handling for the better. Remember...weight to hp.

https://www.torqued.io/tillett-b5-race-car-seat