Hello Joe H,
Biggest reason, because I don't want to crawl under the thing to check the fluid level and also I want to close up my floor and sound proof the cab. I want easy access to check the MC during maintenance checks and bleeding, have a donor SI0 pedal bracket that should work well with minor bracketing for little investment, and feel this would be less fabrication work than trying to put it under the cab anyway. When I talk fabrication, I think this will be minor and will be primarily just between the back of the dash and pedal assembly itself.