Went out to harbor freight and purchased high torque impact. I have decided not to attempt to loosen cross member for several days until the threads of bolts are totally soaked with penetrating oil. In the mean time i have carefully peeled back the rusted area of the seat support sheet metal giving me more area to apply epoxy putty to the holes . I pushed the putty in and am waiting it to dry thoroughly. If this works, I will delay further removal of cross member but just attempt to prepare the bolts for future removal because tank replacement is inevitable at some point. I think I need a psychiatrist to help free me from my obsession with this vehicle....lol. If it wasn't for the incredible ability of this vehicle to plow through 4 foot snow drifts in upstate new york back in the 80's, it would have long been sent to its grave. It is an amazing vehicle from this regard and am afraid that a new one would not be its' equal. New outback owners who were former 90'S subaru owners....please help dispell my paranoia!!!!! By the way, I now live in coastal north carolina....i have not attempted to use it in flood waters yet but i am sure that day will come.