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Click on image for the lowdown. 
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Global Mod,
Mod | | | Forums66 Topics128,040 Posts1,055,478 Members48,424 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Nov 2004 Posts: 1,552 Shop Shark | | Shop Shark Joined: Nov 2004 Posts: 1,552 | The low hump is a flowing curve from the floor board over the tranny. The high hump is an abrupt transition up approximately 6" over the tranny. The height of the cover is relative to the factory equipped transmission, however, if your tranny has been changed, you may have a low hump with a floor shift automatic transmission or an automatic in a factory equipped four speed tranny truck with a high hump.
I hope this helps.
Tony Smith | | |
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