320I help please. it stalls
 

hey everyone i just re did the headgasket to my 1981 320i and set the valves re aligned the distributor set my spark plugs wires cap rotar everything. drives fine but wont stay running at all i beleive this to be the air fuel mixture adjustment i need to do. but cant find the damn 3m alan key screm (brass) any idea or pics to show where it is. IM positive that there is no vaccume leaks. if anyone has any help or ideas to get this car working that would be GREATLY appreciated. Thank you.