1937-1957 Buick Oldsmobile Pontiac suspension upgrade

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(Front Suspension)
(Springs)
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==Springs==
 
==Springs==
The stock springs should work fine. As the Article suggested, you will need to spread the bottom of the spring a bit.  The 58 Pontiac spring pocket is about ¼ inch larger than the previous years. I had chopped 3 inches out of my original springs to get ride height. So now I needed new springs.  My original springs were too long, and to stiff, since the SBC conversion, so buying new stock ones made no sense. I went hunting replacements.  FWIW, I needed a spring rate of approximately 300 pounds, with a ride height of 9.5 inches and a free height of 15 inches. I ended up with 69 Cougar springs. They were listed at 295 pounds, 10.5 ride height and 17 inches free height. Once I cut a full coil off, everything fell into place. They were also 3.88 inches in diameter. Halfway between the original upper pocket and the 58 lower pocket.  
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The stock springs should work fine. As the Rodder's Digest article suggested, you will need to spread the bottom of the spring a bit, because the '58 Pontiac spring pocket is about ¼ inch larger than the previous years. This car required a spring rate of approximately 300 pounds, with a ride height of 9.5 inches, and a free height of 15 inches. '69 Mercury Cougar springs were used. They were listed at 295 pounds, 10.5 ride height and 17 inches free height. Once I cut a full coil off, everything fell into place. They were also 3.88 inches in diameter -- halfway between the original upper pocket and the '58 lower pocket.
 
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==Shocks==
 
==Shocks==

Revision as of 14:09, 24 October 2007

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