Given the large overlap between Jalopnik readers and Stag owners- a relationship we're probably better off leaving unexplored- it isn't surprising that we've heard from Zeusnemesis, the owner of this Triumph. Here's what he has to say about his car:

I was trying to post a few pictures in the thread of how Stags should properly appear: Replete with blonde, and top removed (car hardtop, that is, being a family-friendly site.)
Regardless, I know that editors surely hate being the "tech-guy" for every Jalopnik-yokel who wants to post a picture of his junk (uh, his car junk, that is) but I figured given the near-universal love of Stags, blondes, and V-8's on Jalopnik, perhaps I'd forward a few photos to you to include into the thread if you so choose.
It's got a '64 Buick 300 in it, T-350, and Corvette rear end. So, in essence, it's the "Rover swap," but with a few more cubic inches and a cast iron block with aluminum heads — just like the original OHC "Twin-Dolomite" boat anchor.
No 8 foot long single row Simplex timing chains or any other English-engineered tomfoolery (at least under the hood!). Otherwise, it's all English original Stag, through and through.

If you prefer being a nitpicker to being merely observant, you might then point out that the British Leyland name existed only from 1968 to 1986, and thus several of these ads fall outside those boundaries as well. But here at Jalopnik, we defy categorization of obscure European machinery!

When you're done here, you might check out our favorite VW ads, then go right on with the Datsun, Toyota, Mustang, Renault, General Motors, and Chevrolet ads.

1972 Triumph TR6 (USA)	1981 Austin Rover (UK)	1966 Austin Mini (Australia)
1975 Triumph Spitfire (USA)	1970 Hillman Hunter (Australia)	1975 Triumph, MG (USA)
1980 Austin Metro (UK)	1977 Leyland Princess (Germany)	1976 Triumph TR7 (USA)
1973 Triumph (UK)	1976 Leyland Princess (UK)	1974 Triumph Spitfire (USA)
1981 Triumph Acclaim (UK)	2003 MG ZR (Spain)	1977 British Leyland (UK)	1970 Simca 1000 (Spain)

This is just the second (presumably) running Stag I've ever seen in my life, and it has taken up residence not far from my house. Stags were sold in the United States for the 1971, 1972, and 1973 model years, so I'm going to say this one comes from the middle of that range. Even by British Leyland standards, the Stag was nightmarishly unreliable, mostly due to its not-quite-ready-for-real-world-use Triumph V8. According to the Wikipedia page, the Stag suffered from:

• long simplex roller link chains combined with inadequate engine maintenance and factory specified 7,500-mile (12,070 km) oil change intervals. The chains could last less than 25,000 miles (40,200 km) resulting in expensive damage when they failed;
• inadequately sized main bearings in the early OHC 2.5 litre V8 design with short lives, changed in the 3.0 litre design;
• aluminium head warpage due to poor castings, head gaskets which restricted coolant, leading to overheating;
• water pump failures relating to poor drive gear hardening, prematurely wearing out the gear and stopping the water pump.
• In some cases, overheating was caused by clogged waterways in the cylinder block, found to be filled with casting sand left over from manufacture.

But this one has risen above all those handicaps and survives down on the Alameda street. It lives just around the corner from the 1948 International Harvester KB-2 pickup, as we can see in this photo.

(Buick): I saw this lovely ol' gal docked in Pacific Beach and thought you might enjoy. She appears to be original and the relative lack of rust tells me she hasn't spent her whole life in CO. I'd peg it as a '68, giving it the 2bbl 350, right?
(Triumph) I saw this beautiful Stag, replete with removable HT option, when I went to my neighborhood c-store today. Apart from the dirty water spots and the slushbox, the car is absolutely flawless. Don't know about you, but I don't see one of these every day - let alone in such great condition. Hopefully has owned it over the years has been insane enough to keep the original TR 3.0 liter V8.