Disconnect pcv and run engine and see if is puffing smome. If it is not you have poor pcv vaccum or crank case ventilation. If is puffing smoke a broke ring , not seated ring or intake gasket not seated properly sucking oil from under the intake.
I am looking for model tt truck doors in good shape if anyone had any please. Will pay a fair price. Have a 1924 tt truck with a flathead v8 am wanting to restore to its former glory