does anyone know if full size chevy keys will work?

I'm gonna say no... But then again, anything can be accomplished with time and money.

true is was just wondering if by some slight chance they would work

I believe that the hex on the end of the torsion bar is larger on the fullsize trucks as well as the key being longer. I don't have time to actually check anytime soon, but I could measure things on my truck and my dad's and compare. But like I said, I doubt they'd be interchangable.