JP, on my one set of a-arms i have here in the office, I can measure less than .005" worth of gap between the face of the needle bearing housing and the face that is perp. to the needle axis.
With
very (a few pounds at most) little pressure holding the assembly up against this surface, in only a few spots can I slide a piece of paper (an amazingly accurate and repeatable .003") between said surface and the gold colored housing or the thrust washers. I tried this along the entire radial mating surface on both sides with the same results.
The thrust washers will "float" at this surface to make up for any angular differance (up to 2 or 3° I'd venture and if you are that far off the arm is bent)
As a customer I understand your worries....as a friend, I'd say don't worry about and throw these puppies on
Remember, these parts are made on CNC machinery....our 914's had been assembled by beer drinking Germans
Mike Mueller