A good surveyor will have knowledge of the things that often go bad with a specific hull. Instead of you asking the surveyor what to look for, ask what he or she will be specifically looking at.
Some things that you mentioned such as hardtop welds, canvas condition etc, are potential cost items but you should be more concerned about structural issue and/or hidden damage. For example, water damage to wiring due to storm, flooding or sinking is often not obvious. Some hulls have known issues with stringer rot or transom moisture. A good survey should include inspections of both ( stringers can be impossible to directly inspect in many cases). Moisture in the transom, deck, sole, lockers etc can be detected by a trained surveyor with knowledge of the use and interpretation of moisture meter readings. Hull inspection for previous damage, blistering, suspect repairs and the like should be done.
For these inspections, the boat has to be out of the water and relatively dry (not raining

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In my neck of the woods, surveyors usually do not do outboards. That will need a mechanic. The Yami motors in that time frame have a history of corrosion issues and even with a scoping can have problems that can't be seen.
In talking recently with a knowledgeable surveyor that I have years of experience with about a boat I was interested in with F250s in the same yer range , his comment on the corrosion issue was " Assume eventually that it will affect your motors" That was quite an eye opener. OK, he may be a bit dramatic but he has a ton of real world experience. He said, if you go ahead, figure that at some time in the future, a repower will be in order.
If the seller has had the motors scoped and can prove it, the better off you are. If the seller has proof that the mid section was replaced, even better.
If there is one simple rule to help judge the maintenance of a boat it is" If the boat looks like it was properly maintained, the motor probably was also. Some boaters really care and some couldn't give a darn. I personally know both types.
Best of luck with you boat hunting