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garyd1961 · 11-02-2017, 08:03 PM

The 062 heads have hardened valve seats but the 906 heads have hardened valve seats "inserts" and are suppose to be less prone to cracking. The 906 heads are for the 3/4 ton trucks but will work for a 1/2 ton also. The 906 also came with sodium filled valves that had a larger valve stem.
Either one should work fine.

11-02-2017, 08:03 PM	#7
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: VORTEC HEADS(another one I know) The 062 heads have hardened valve seats but the 906 heads have hardened valve seats "inserts" and are suppose to be less prone to cracking. The 906 heads are for the 3/4 ton trucks but will work for a 1/2 ton also. The 906 also came with sodium filled valves that had a larger valve stem. Either one should work fine.