6 hours in six years means that none of the systems have been regularly used. You may find things work for a few hours and then start to break down...
Saw this with a Pawnee that had done only a few hours per year, for 20 years, and the whole thing was a near disaster. It ended with a very serious engine fire, in the air, which was due to a blown exhaust, which was due to a mag problem (huge backfire), which was due to lack of use ....
Run a mile....
UV