Ford authorized sale of "imperfect" model a engines.

[Kevin in NJ]

Originally Posted by ursus

I have thought this as well. Some NOS parts that I have bought off of E-Bay were dimensionally defective in some way. I recall a large E-Bay auction of parts salvaged from an old Ford dealership in which almost every box or tag was marked "NG" in grease pencil. I suspected that the letters meant "No Good".

It appears that parts made later, after A production, were not built as well. They were likely contracted out. I was told that some known 40's production flywheels were not balanced very well right from the box.