I personally own a 1985 Impala four door sedan and a 1989 Caprice four door sedan that were both formerly 9C1 cars before I made hot rods out of them. I do not feel hurt that no one wants to talk about my cars. No one plays with my cars which is why I like them so much (same size and weight as a 1970 Chevelle but totally unrecognizable as a muscle car even though both have motors in them that dyno way north of 500 horsepower and have HD suspension, steep rear gears and run exceedingly well for stone stock beaters ($100 buys a demonstration).
The greatest number of registered users are owners of 1961-67 Impalas That is what people generally think of when they think of old Chevy muscle cars (since the Impala didn't exist before 1958 so the 100 150 210 model Shoe Box Chevy's of 1955-'57 are not really viable here) To my knowledge no one has ever asked a question about an early Tri five Chevy though I have seen their cars in background shots showing their Impala or Bel Aire or Kingswood or any other model in the fore ground. After 1967 everyone thinks of the Camaro or the Chevelle as being the muscle car and the big B-bodies popularity falls off quickly (as the Impala put on a lot of weight and the power of the motors dropped like a stone in the smog years).
That said; no one is specifically excluded. If you want to come and join out site and talk about what a wonderful experience you have driving your new wrong wheel drive V-6 EFI Impala no one will harass you (without having me censure them for it). I just do not expect anyone to talk to them, as their interests lay else where (it is a birds of a feather flocking together thing; they are not being anti-social; they are just not interested).
By the way your 1977 was the first model of the 1977-'99 production run that was the last of the rear wheel drive B-body line. Ask away on questions and please feel welcome.