i am trying to replace my rear subframe bushings but as soon as i put a wrench to the bolt the nut that u can not see or touch broke loose from it hold. now the bolt & nut just spin freely. a mechanic told me i had to put a hole in the frame to get at the nut, but i red that u can go thru the floor panal on a gen2. can i go thru the floor on my gen1 the same way? cutting a HOLE in the frame seems EXTREME to me. PLEASE HELP I NEED MY SHO !!!