Mine is cv 19, I have an "E" pump and last year when I was 3% over on the blower it ran about 78 mph, I have a b cut imp done by jack and a flowed bowl I bought from him, stock diverter. The 20's are cool with that built in swim deck and the dash is a litte diff and the windshield is smaller. They are a heavy layup and take rough stuff pretty good. Mine is a 76 had an 8 track and still has the orange shag.