A 14 year old did this.

Me: How long did this take you?

Kid: Who knows.  I was 14 and couldn’t drive so I had plenty of spare time.

Me: How’s the torsional rigidity?

Kid: It’s not too bad.  The roll bar and spare tire rack help a lot.  My friend sawed the entire roof of his SUV off, along with its B-pillars.  That didn’t quite work out.

Kid: I’m going to make the truck bigger.

Me: Like, are you going to put bigger tires on it?

Kid: No, I’m gonna drop a Cummins diesel in it.

Images source: Copyright 2012 Hooniverse/Jim Yu