Gas tank shouldnt be too hard to get out. Might snap a bolt or two, but thats ok, run to the nearest hardware store, buy some grade 5 bolts, and drill some new holes.
Dad: Why did you take your rear seats out?
Me: Because I wanted to.
Dad: Well you're gonna put them back in.
Me: Why?
Dad: Because I don't want them sitting in the garage like that
Me: Then I'll move them.
Dad: Ok...