Looks almost normal now
Here's the rest of the seat back/firewall done, except for the little bit at the top. Makes the cockpit much more 'visible' and reduces the apparant length to something almost familiar, something admittedly with four wheels.
The piece of foam in the seat base is to do the adjustment between people with long and short backs. In theory quite a big person will fit in here, while standard dwarf-sized racers will have to sit on a piece of foam to see out.