Furry-
C-Dory hulls are forever! The life of the hull has virtually never been a factor with these boats.
There are a couple of 27 ft configurations, from Pilothouse to longhouse and others. Which one is this boat?
Plan on a repower. If the boat's a Sea Drive (basically an outboard on a large bracket, it can be replaced by another outboard with a custom made bracket or a bolt on box like transom extension which has both flotation and is an extension of the boat's bottom.
Outdrives and inboards can also be replaced, either singlely or together.
Either way, check out the cost of the repower, though, because it will not be cheap.
Financially, you need to consider the overall cost of the boat, the repower, and other additions or replacements/undates such as electronics. It will probably cost more than anticipated at first.
As far as the hull goes, it's just a question of whether the particular hull meets your expected needs and use pattern.
I almost bought the 27 ft Pilothouse that became Alvig a couple of years ago, but backed out because I didn't need that big a boat here on an inland lake, and because I had all the features needed on my CD-22 Cruiser that is much more trailerable.
If you like or don't mind some project work and planning, go for it!
Good Luck!
Joe.