I'm pulling the motor out of our '49 6400. I have two bolts on a rear cross member that I cannot seem to get out. Does anyone know if there is some trick to getting to the top of these bolts? When I spin the nut on the bottom, the bolt just turns. I cannot see or feel the top of the bolt, it seems to be buried in the top of the rubber motor mount somewhere. Everything else is ready to go. Unless I come up with a better plan, the torch comes out tomorrow and I'm gonna cut those things out! Any other suggestions?