1984 Sea ray 270 sundancer - stringer and engine inspection

[poolenglish]

I am purchasing a 1984 270 Sea Ray Sundancer and would like any advice on doing the survey of it tomorrow. I am mainly concerned about areas where I can inspect stringers and weak points of the vessel that I should inspect. It has twin 4 bangers (488 mercruisers w/ 4" heat exchangers. This is my first post here. I grew up on a boat yard on lake Michigan and have experience w/ stringer repair and replacement.
Mainly looking for advice on what to watch of for on this model from someone who has this boat and/or engines.

Thanks a ton everyone, this forum is sooo cool!

Pat