https://www.curbsideclassic.com/automotive-histories/automotive-history-british-deadly-sins-high-brow-hybrids-part-2-bristol-603-britannia-blenheim-arrested-development/#more-329607 
Not all Bristols were reserved for the élite…
Anthony Crook (1920-2014)
‘60s stagnation – the 409 (1965-67) above was almost identical to the 408 and to the 410 (1967-69) below
By the time the 411 came around in late 1969, the Bristol coupé was a well-known quantity. This quantity was high in pounds (both avoirdupois and Sterling), low-key in terms of styling, minuscule in units made and therefore incalculably great in snob appeal. Chrysler now furnished Bristol with the larger 383 (6.3L) V8, which was partially rebuilt at Filton and given a few Bristol parts and tweaks (camshaft, exhaust manifold, compression, etc.), producing 335 hp. However, instead of greeting every grille change with a new numeral, Bristol made the 411 last for five series
The Bristol 603 was a Deadly Sin of the slow-killing kind, one must say. The original car was fine for the ‘70s, but it was allowed to bloat up and wither well past its relevance. It took 35 years, but Bristol finally halted all chassis production in 2011. The facilities are still in use, as the Bristol repair / reconditioning side (and the showroom) are still operating, but no new cars are being made.
In a belated and long-delayed effort to change their image, Bristol finally launched a completely new high-performance car in 2003, though Blenheim production continued. The gullwing-door Bristol Fighter was powered by the Dodge Viper’s 8-litre V10, with a few modifications from Filton to bring it to a minimum of 525 hp.
Tony Crook in front of the one and only Bristol showroom in the world
