I do not know what model boat i have. I do know from the registration tags that it is a 1966 starcraft 18'. It is a closed bow with a 110 mercruiser i/o. here's a pic of it.
You can use the transom width & max beam (likely across the helm seats gunwale to gunwale) and confirm that it's a 1966 & that it's a Holiday 18'. There isn't a Starcraft plate @ 4" X 4" near the throttle's remote control or on the left side of the starboard console?
Great looking boat, even if you can't positively ID which