Grahor's pictures are most interesting. My recollection of the one I bought (a long time ago) are pretty vague, but I'm fairly certain it was molded completely in black. I remember being impressed with the spars - which, appropriately, offered the modeler the choice of a lateen or gaff-rigged mizzen. The photos showing the gun carriages show the problem they have: the cheeks are parallel. (They should be tapered, to follow the shape of the guns. Fixing that probably would be a waste of time in most cases, since most of the guns are pretty thoroughly hidden, but might be worth the trouble for the ones on the weather decks). Mention of the copper sheathing jogged my brain into remembering another problem that (I think) I noted those years ago: the molded "copper sheathing," as I recall, followed the bottom of the lower wale, rather than the waterline. That shouldn't be too hard to fix.
Brian Lavery's excellent, two-volume work, The Ship of the Line, contains, in the appendix to Vol. I, a list of all ships of the line that served in the Royal Navy during the sailing ship period. (Contrary to what the title might lead one to expect, the books are about the British navy - though the author does mention some foreign ships in passing.) Ships captured from foreign countries are listed in separate categories. Mr. Lavery lists fifteen French 74-gun ships as having been captured and placed in British service between 1757 and 1815. He includes basic dimensions; I've only copied the lengths on the gundecks. Here they are:
Seven Years' War:
Courageux - 172' 3"
Centaure (renamed Centaur) - 175' 8"
Temeraire - 169' 2"
War of American Independence:
Pegase - 178' 1 3/4"
French Revolutionary War:
Formidable (renamed Belleisle) - 184' 5"
Genereux - 185'7"
Napoleonic Wars:
Duquesne - no dimensions
Duguay-Trouin (renamed Implacable) - 181' 0 7/8"
Mont Blanc - 183' 2"
Scipion - 183' 2"
Brave - no dimensions
Jupiter (renamed Maida) - 181' 9 7/8"
D'Hautpool (renamed Abercrombie) - 182'
Royal Hollandais (renamed Chatham) - 177' 7"
Rivoli - 176' 5 1/2"
The names Glorieux and Superbe are conspicuously absent from the list. When I went through it I was only looking for 74-gun ships; maybe those two were listed differently. Or maybe I just missed them. I'll take another look. When it comes to things like that, Mr. Lavery doesn't make many mistakes.
Later edit - I took another look at Mr. Lavery's book. He lists a French ship-of-the-line named Superbe of 64 guns as having been captured by the British on July 29, 1710 (during the War of the Spanish Succession). She was 143' 6" long, and was broken up in 1732. This clearly was not the ship represented by the Heller kit.
According to the same source, a new, 74-gun H.M.S. Superb was built at Deptford Dockyard, launched on October 27, 1760, and wrecked in 1783.
I looked up several accounts of the Battle of the Saintes (or Saints, depending on which source one looks at). They agree that a ship-of-the-line named Glorieux was indeed part of DeGrasse's fleet; that she was captured by the British during the battle; and that, having been mauled severely in the process, she sank with most of her crew shortly thereafter - before she had time to be taken into British service. (That would explain why she isn't listed in Mr. Lavery's appendix.) I wasn't able to find any reference to a British sailing ship-of-the-line named Glorious.
Most of that is consistent with the posts above. It seems we do have a couple of cases here of minor contradictions between sources. I don't have the credentials to either explain or resolve those contradictions, but my strong inclination is to trust Mr. Lavery unless there's a compelling reason not to do so.