I don't mind seeing mustangs. Far less of them than Camaros. Any website dealing with pro-touring = 1000 Camaros, 1 of something else. BooOoOOoOOOOOOORrrrring
Chevelles are full frame cars frank
68 Is different from the 70 model, rarer - probably, not as desirable though, so if you ever need to sell, could be tricky.
Chev - You should feel more comfortable in them, they are a full size muscle car, and a fair bit larger than the camaro you have which is a pony car.
Hope to see the pictures soon.