78 450 Sel Fuel Distributor Rebuild

[Benz007]

I have inherited a 78 450 sel Mercedes. The tank was bad but car ran great with the fuel line attcahed gas can in the trunk. I bought a used tank but the mechanic did not clean it before installing it. The car quit running the day after the tank was installed. The mechanic then took the fuel distributor apart to clean it and did not note the spring and shim locations. I am going to rebuild the fuel distributor myself but need to know how to determine the spring and shim locations.