Look at you wiper motor, the concealed wiper motor is round and tubular shaped. I believe the non-concealed motor is rectangular. Also if you posts that your wipers attach to looks the same on the left and the right when you have the non concealed wipers.
Concealed wipers have a two-piece arm for the driver's wiper; the second piece is smaller, thinner, and is more-or-less parallel to the main arm. The secondary arm pivots off a pin at the cowl area. See photo
Non-concealed wipers have a driver's arm that is similar to the passenger arm in that there's the main arm and no secondary arm.
In 72 if it was a Malibu or a SS car it had the hidden wipers. The base Chevelle models came the other way. Non hidden. The non hidden cars have a different stainless trim below the windshield. It was a thinner piece, not as tall so to speak. So look at your stainless trim, it will measure 3" high in the center or 3-1/8" high on the ends if the car came with hidden wipers.
I believe I have an extra hidden wiper transmission arm, but you would have to change your motor if it the wrong one.
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Ray
1970 SS Chevelle Van Nuys Built
Last edited by shadowgray396; 02-01-2014 at 01:37 PM.
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