I am welding in a 4-speed hump into a customer's '70 Charger. The transmission hump manufacturer said that some cars had the motor set back 3/4 inch farther than others, due to the trans crossmember being "off".

Does anyone know where to notch the floor stiffening rib for shifter clearance on these few cars? I would like to notch it now, just in case. It's a lot easier to do it before the hump is welded in place. Thanks.