Assuming she carried 9 pounders the below should be close. Sorry for the imperial numbers. The height of the gun port would be about 5mm to the center from the deck. IF the gun barrels that you have are correct the distance from the deck planking to the top of the carriage should be about 4.5mm I believe Enterprize had 7 foot barrels which were actually closer to 7' 11" long based on what I could find.

