I have the stock chrome bumper on my 88 4Runner. It's the biggest piece of junk Toyota ever produced. Shiney yes, strong, HA! It should only be used to rest a can of soda on, anything else will bend it.
I bent it standing on it to load a kevlar kayak that weighs under 30 lbs. I'm only a buck eighty so these things are WEAK as hell. I think if you backed into something it would probobly fold in half then fall off.
I'm pulling it off and tossing it as soon as I can find somene local to weld up a real bumper for me.
Oh yeah, after I stood on it the holes don't line up to lower the spare tire. Trust me you don't want one. Geo Metro bumpers are tougher.