Factory Carb Metering JET size ?

[NWSooner]

Greetings friends, I'm back for more help, I know its been a month but I have not forgotten all of the excellent responses from my original question, thanks again!

Here is the deal:

The truck is still running a bit to rich and I think it's because of the incorrect JET SIZE in the carb, does anyone know what size my 66 C20 w/Inline 6 250 Rochester 1 barrel should be? The size stamped on current Jet is .071

Thanks in advance

NWSooner