Working on the floor of my 38 today. Drilled out the spot welds on one side of the seat base and used a standard stiff putty knife and ball peen hammer to seperate the pieces. Occured to me to skip the drill and just try the s****er on the other side. Popped them all loose and with no holes to weld!
they make a tool called a panel knife, sep it works on the long sides. works great on rough stuff. not so great on the stuff you need to save.