[firstgenaddict]

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Got a picture of the factory masking apparatus? Just for an FYI kinda thing...

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This is a direct quote from JohnZ from a thread on this board...

I worked at the Chevrolet Pilot Line from '66-'70, just a couple of hundred yards down Van Slyke Road from the Flint V-8 plant, and I spent a lot of time at Flint V-8 during that time; a friend of mine ran the Piston Department.

Both Flint and Tonawanda used vacuum-formed plastic masks on aluminum intakes and on aluminum or chrome valve covers during painting, and the intake mask was pretty much open at the front to accommodate the water pump bypass fitting and hoses - that's why you see more overspray at the front of the intake than at the rear. Engines came through the paint booth at Flint V-8 at nearly 300 per hour, and it was hardly a "concours" operation - the last guy at the exit of the booth was plenty busy removing masks, cardboard tubes from the spark plugs and water pump hub, the can over the distributor, tape from the stamp pad, etc., and I never saw anyone doing any "silver touch-up" at the front of any intakes. This operation varied a lot from hour to hour and from day to day, and it wasn't precise or consistent by any stretch of the imagination, as each guy had less than twelve seconds to do his assigned job, and engines with aluminum intakes and valve covers had twice the work content for them than standard engines.

The way we restore engines today, we wouldn't be satisfied with the way aluminum-intake engines actually looked when they left Flint V-8 or Tonawanda in the 60's.