seat modification for drag racing

dont know where to post this question... so i put it in here...

i´m just about taking my fish this year to drag racing the first time here in Germany, just to get an idea what that car will be able to run...

regarding to the offic. rules here, non locking folding bucket seats will be not allowed, so i have to modify the drivers seat in that way.

has someone done a modification like this before on his early bucket seat ?

any proposal/idea is welcome/appreciated

cheers
Timo