so i started to swap out the rear controls arms on my 94 si and i got my self into quite a pickle. when removing the rear trailing arm, me and my friend managed to break 3 out of the 4 bolts that hold that huge bushing in. we tired to drill it but it eats my drill bits like their made of chocolate lol. has anyone every broke these before? any suggestion on how to fix? i was thinking of cutting the piece out and welding a nut on a piece of plate steel and welding that back in my car.