This is for the K20 with the 327 in it. It has a manual choke which I just hooked up. How is the choke supposed to be set? Im actually not to famaliar with that. Its supposed to be cracked about a pencil width open for starts and after it warms up open it all the way? No, I still havnt timed this. Also I swapped the heads off and adjusted the rockers my self(first time) with the engine not running. Maybe I did a bad job adjusting?