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Re: General Stock Cam Question
When these trucks were being produced, they were having to deal with rapidly changing emissions requirements, evolving emissions equipment, lead being phased out of fuel, changing octane numbers, etc. Also, GM didn't know ahead of time if a purchaser would be using a truck/motor for heavy towing, in town delivery, suburban trips to the hardware store, or highway traveling. And it needed to start cold in -20* weather and hot in 120* weather.
Much easier to pick a specialized cam when you know your end use is for example:
80% highway towing with 87 octane pump gas (towing cam)
street drag racing using 91 octane real gas(higher RPM cam)
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