It IS aftermarket...I bought it in 2017 when I was in Oregon and visited Wildcat Auto wrecking.
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That is a great display.View attachment 1716410219
On a '67 tank a short arm will never read the full range.
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Fuel Sending Units and A-Body Fuel Tank Map
There are two Main Reasons that Aftermarket fuel sending units do not give accurate fuel level readings. The first and most important is that the wire-wound variable resistance board on the stock sending units are shaped and wound for the tank that it was intended to be used in. Therefore the...www.forabodiesonly.com