Great write up mate, appreciate your time doing it, but those seats look dodgy as shit.
Dammed if i'd let one of my kids ride in a car with those in it.
I guess your trying to achieve a racy look on a budget but this is potentially your life your playing with.
Even without considering the lack of an air bag, Id hate to think how they'd perform in an accident situation.
Damm straight they'd be illegal & friggin immoral.
Cheers.