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Seriously, don't mess with the cam that much unless you only plan to race it. Mild compression increase in the pistons and an RV cam will give you some decent improvement, and an exhaust header will also help.

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โˆ™ 2006-04-10 14:42:28
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Q: What is the biggest cam and roller rockers you can put in a 1990 GMC Sierra 350 without doing anything to the pistons?
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