Lip cut off frame rail and ground flush. Rail squeezed parallel, roughly these rails are over 3/4 inch wider at top than at the bottom, bent floor over edge of rail now they were parallel and welding it back up. Gained a little more room and will be able to set the inner tub in a bit further now. These 315's will be tucked up nicley inside what will look like a facroty tub, just wider