Hi. When installing a tunnel hump for auto to manual , how much of the floor needs to be cut out, also the floor brace that is there has to be cut, i have the new hump panel and it seems that when the bucket seat is postioned all the way to the front ,it rubs at the front. is this normal. can someone maybe give me measurments for the shifter hole say from centre to firewall, and centre to drivers door. thanks ps no drivetrain in car yet.