drop the wrench in the back side open or boxed .
hit the bolt with a GOOD impact gun or breaker bar .
if frozen heat is your friend .
done lots of them this way .
be thankfull its not a newer truck as them stupid designers put the bolt out threw now before the gas tank is installed . . . . have to drop the tank to remove the spring . . . unless you cut the bolt 3 times as you slide it out and then install a new one the correct way it should have been done .
