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garyd1961 · 12-26-2020, 09:40 PM

Some will say the 906 head don't flow as well as the 062 heads but don't pay that any mind it has been proven false. Are you sure they came off a c1500? The 906 heads are the HD version and came on the 2500. They should have harden valve seat inserts which is good because these heads are prone to cracks around the valve seats. The cracks don't seem to make a difference on a running motor but it's not recommended to reuse heads with the cracks. I have 906 heads on my motor and it runs great.

12-26-2020, 09:40 PM	#4
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: Help Identifying Pistons Some will say the 906 head don't flow as well as the 062 heads but don't pay that any mind it has been proven false. Are you sure they came off a c1500? The 906 heads are the HD version and came on the 2500. They should have harden valve seat inserts which is good because these heads are prone to cracks around the valve seats. The cracks don't seem to make a difference on a running motor but it's not recommended to reuse heads with the cracks. I have 906 heads on my motor and it runs great.