Little engine delimma I need help with.

not an A body but another project I have going. A few years ago I bought a truck pretty cheap with a blown up 4.7 in it so I pulled it out to replace and couldn't find one for sale so I rebuit it which got pretty costly because it was thoroughly destroyed. To make a long story short, between selling my business and my building and moving all my car stuff around it's ended up just sitting for about 5 years before we got it installed. When we fired it up we have one cylinder that is dead(number6) and I suspect the rings are stuck in that cylinder as a result of my procrastination and some sub par storage facilities so the question is, is there some mirical cure or desperation move I can try to get this cylinder to work before I start tearing into it again? Any practical advice or old car guy tricks would be appreciated.
A 360 or a 5.9 magnum should be pretty cheap at a pic-and-pull. Easier too.