I wouldn't use a ratchet on anything which is going to require a lot of torque.... all that pressure and when they break knuckles end up being smashed against something much more solid

Can you get hold of a 1/2" socket for example and solid bar setup? If something does break its always the bolts when using that technique from past experiences or stories
Would definitely put it back into the bike and WD40 like W00dzy suggested.
What about an air gun and compressor? Soon rattle them off but not exactly cheap to just go out and buy if you dont know someone with one!