sounds like a 1977 model CG 
7Round hole is goosey and oval is decoster
gooses were both full cromo and front triangle 
where as de costers were i believe full cromo 
astab forks cranks all sound spot on 
get some pics up  

heres one of my 78 project 

its got rat traps 3 arrows cain wheel and ashtabula cranks as well now 
need tyres decals and a blue paint job