RE: [Chrysler300] Heads!

["Laurence G. Johnson" <laurence_g_johnson@xxxxxxxxxxx>]

Hi Marshall,
What you have are a pair of late (71-75) 440 smog heads. The 4006452 is the 
casting number, it should be cast on the top of the head on one of the 
ports. They are good heads. I ported a set for my sons drag racing motor and 
they made well over 600 horsepower. In lieu of insert exhaust seats they 
have induction hardened exhausts. The metal is better than the famous 906 
head.
Larry Johnson

>From: Marshall R Larson <yelof@xxxxxxxx>
>To: chrysler300@xxxxxxxxxxxxxxx
>Subject: [Chrysler300] Heads!
>Date: Thu, 30 Jun 2005 11:40:14 -0500
>
>Hi group.
>
>I just acquired a pair of what I thought were 440 heads.  The PN is
>4006452 but they don't have hardened seats and they have full combustion
>chambers unlike the 413 heads from my engine that are flat beyond valve
>area.  The valves are 2.08 int. and 1.743 exh.  The also have smaller
>springs and no dampers.  What are they?
>
>My original heads are PN 2206324 with 2.08 int. and 1.610 exh.
>
>Minnesota Marshall
>Red G,  27 & 28 Dodge Brothers.




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