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Old 10-03-2016, 08:06 PM   #40
Lefkada
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Join Date: Dec 2015
Location: San Diego, CA
Posts: 51
Re: First motor start, terrible knocking

Quote:
Originally Posted by Boog View Post
I don't know about the differences between those two head castings but could it be the rockers are binding with the valve rotators? That's an angry sounding noise. It stands to reason the only changes made were the head exchange so this noise should be related to the heads.
How is the oil pressure?
I looked up the head castings (http://outintheshop.com/faq/casting/heads.html) and there seems to be no difference in specs. One was used on 307's/350's and the other used on just 350's.

Oil pressure reads high on the stock gauge.


I just added 2 more quarts of ATF (I'm at 6-7qt now) and the sound remained, so I don't think it's the tranny pump.
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1972 C/20 LWB, 350/350
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