Re: IML:1960's 413 Cylinder Heads/ Newer Style vs Older Style

[randalpark@xxxxxxx]

The matching rocker shaft assemblies are there, and we plan to proceed 
in that direction. Thanks for your affirmation! With any luck the car 
will be back on the road in another week.

Paul W.

-----Original Message-----
From: charlesdmajor@xxxxxxxxx
To: mailing-list@xxxxxxxxxxxxxxxx
Sent: Fri, 30 Mar 2007 6:25 PM
Subject: Re: IML:1960's 413 Cylinder Heads/ Newer Style vs Older Style

I have been down that road, you have to get the new
matching rocker arm assemblies.


--- randalpark@xxxxxxx wrote:

> I have discovered a problem in replacing ONE of the
> heads on my 1960
> Imperial. The replacement head seems to be for a
> later engine, and has
> towers for the rocker shaft cast into the head. The
> earlier design is
> made differently in this respect. We see no other
> differences in
> specifications for push rod length, valves, valve
> springs, etc.
>
> I think that the replacement may also have more
> valve cover mounting
> holes, but the old valve cover with fewer holes
> seems to line up with
> what is needed to fasten down the valve cover. I was
> aware of this
> difference between old and new style big block
> heads, but the rocker
> shaft mounting towers was something I had not heard
> before.
>
> Reviewing my various FSM's and pictures in the
> Engine Section, it
> appears that this change occurred in 1964. Has
> anyone here encountered
> this? Other than the actual rocker shaft, will the
> head fit and
> function the same as the old style on my engine?
>
> Thanks in advance for anyone's help/advice!
>
> Paul W.
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Charles Major
270.791.4139 Moble
208.728.4443 FAX



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