Welcome radioshop
Glad to hear your enjoying the CSC web site [img]/images/graemlins/shocked.gif[/img] Even thou you have a Classic Aquasport, I'm also happy to see you have picked up some information from everyone to keep your boat many more years
This site will become addicting
If you search through the old threads you can read other posts on this issue. Some people have different views on plugging the vents but I have discussed this very issue with Mr. Potter and not only did they serve as ventation for the fuel fumes they helped prevent moisture build up and preserved the decks. Scott beat me to it, but also IMO, I would not seal your vents up. It also would be keeping intact the lines of your hull
Good Luck!