air shocks?

ok to start off i know this is ghetto but just go with it. ok i have slamed my daily driver s-10 and the back now hits the frame when i hit a bump (not bumpstop or the metal bumpstop cut that off) so just for a while i am think'n of use'n air shocks to raise it a lil till i bag it (bout 6 moths from now) so is it worth it was told they are about 60 bucks from autozone? and will one 450 be enough to use to raise it or will i need a small tank??

u can get like a 3 gallon tank,2 valves, some airline and use airshocks