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Old 08-06-2016, 09:31 PM   #1
saddletramp
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72 Sierra Grande Help

Hi Guys &Girls I need some help identifying what heads i have on my 72 GMC 350 motor ive had a couple of people tell me their not Double hup heads so what are they? ?
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Old 08-06-2016, 10:29 PM   #2
71swb4x4
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Re: 72 Sierra Grande Help

Find the casting numbers. Pull the valve covers to find it, it's in the rocker arm valley. http://www.nastyz28.com/sbchevy/sbch.php
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