I have that spring on our 53. We had the hinges and spring powdercoated. Seems we have lost some of the tension. Hood doesn't want to stay up as before. Maybe the powdercoating had something to do with it.

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53 half ton http://s159.photobucket.com/user/sworden73/library/?sort=3&start=all&page=1
72 Nova SS sold
75 Corvette
52 Chevy Styleline Coupe