I dont think its emission controlled like my 79' , but I 'm almost positive its all factory. But! you never know how good the po was at hiding stuff. It has already passed emissions, but we're smog exempt out here sooo.... ...whatever? My mechanic said it's good to go accept the power valve. When I bring it home I'm going to situate it in the yard and pull the carb and replace the power valve, $25.00 bucks or less. Probably Tuesday, work and softball Monday.