Depending on how the powder coater moved the chassis around, the mount tube could have been moved out of its original position. I only say this because I saw my powder coater bend my cluster mount tabs when lifting the chassis with his forklift. I'm not sure the mount tube would bend/move nearly as easily, but it's possible.
My only issues with my throttle pedal were lining up the pedal box mounting holes and tunnel interference. I had to fight with the pedal box a bit to get the holes lined up but no trimming was required. On my second or third test drive, I floored it and the pedal got hung up on a tunnel cap rivet. A little force on the pedal arm fixed that before using the 3D-printed pedal extension that moves it entirely away from that part of the tunnel.