Re: 268 sundancer
The drive was probably done because the driveshaft bellows failed and let water into the drive. The manifolds are due again.
When taking a test ride dont just go for a short trip. Be sure ALL guages work properly, blowers operate, and no fuel smell. Check all fluid levels before and after the test ride, also noting any water/fluids in the bildge or floating around behind the boat. Take the boat out and run it hard and long enough that any overheating or oil pressure problems will show up. Note any shaking/flexing of the hull, decks, windows and doors. Flexing is a sign of structure damage i.e. rotten stringers and structure. Flip every switch and turn every knob making sure things operate properly and not momentarly. A good Surveyor is worth their weight as is a good tech.
BTW another little hint, when you do go look at the boat get there early and unexpected so you can hear and see how the engine cranks, runs, and sounds cold (open the engine cover on start up). Many sellers will preheat engine so they appear to crank and run better, as they are hot and start easier.
Good luck.