I am also looking for buckets, comfortable with a harnes, racing style with driving comfort. Is this possible? I have a 73 Nova. And it may sound dumb but I wanted buckets in back, or no seats at all in back, can it easily be done, I am fairly handy at fab work.
As far as racing style seats Sparco seems to be a popular choice in the more high end cars. As far as I know any seat can be adapted to fit. If you want to run power seats it would be a little more work but with any seat you could fab up the mounting bracket for it. So I say, find one you like at a junk yard and have fun.
back in the seventies i ran a nova bracket car, used ford bucket seats, light and almost bolted right in, i think they were Maveric maybe Pinto, been a long time, but they fit and matched the door panels well.