One of the best sources for reference is the book 'The 100 Gun Ship Victory' by John Mackay from the Anatomy of a Ship series (I got mine from Amazon).
I've also just returned from a cruise round the Med that departed and arrived in Southampton - just 30 miles from Portsmouth. I took a day trip to visit Victory, and really enjoyed it. I got a huge number of reference photos that I may be able to let you take a look at.
If you get the chance, you really want to see Victory. It is really impressive, and is in immaculate condition. The conditions that the sailors lived in were appaling, with very little space to move around in. Also, the ceilings are extremely low (I'm 5'10", and was crouching most of the way round). Also, make sure you look at the surgeon's instruments on the Orlop deck - nice!
If you go to Portsmouth soon, you will have access to the Victory, and the Trafalgar Sail exhibit - the original topsail that was flown at Trafalgar, still sporting the battle damage inflicted by the Redoubtable.
Cheers,
Malcolm
'England Expects That Every Man Will Do His Duty' - Vice-Admiral Horatio Lord Nelson - Battle of Trafalgar - 21st October 1805