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Old June 8th, 2023, 09:27 PM
Prowbar Prowbar is offline
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Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 478 V6, SM420
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Default Magnum camshaft specifications

My 1965 manual has a nice camshaft valve timing diagram as seen in the picture.
Pete Chronis told me the Magnum engines had an improved camshaft grind.

I'm looking for the 1966 and up or Magnum camshaft diagrams, to compare the two.
Attached Images
File Type: jpg Camshaft timing 401-478 60-65.jpg (3.40 MB, Multiple views, 11 clicks)
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