The two Alloy heads are different. The one Moss sells is from SC it
has a single piece of steel inserted into the head with two valve
seats cut into it. The DW head has two separate valve seats installed
into the head. As for the port work I have not seen the SC head but
the DW head has had extensive port work and the large mass in the
ports that is blocking the air flow has been removed. They increase
performance a lot they also help cooling, reduce weight, as well as
decrease run on.
We have installed many alloy heads and have lots of good responses to
them. As well as since most cast heads have or will crack and the
repairs to these heads usually fails then the alloy head is the best
answer.
The leaking head gasket problem will happen no matter what until you
install a multi piece steel head gasket with hardened studs.
David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767
www.britishcarspecialists.com
.
.
On Sep 24, 2008, at 6:32 AM, Tadeusz Malkiewicz wrote:
> Hello,
>
> I am wondering if anyone has bought the aluminum head from Dennis
> Welch. How
> is it?
>
> There are also a number of other sellers of the aluminum head -
> Moss, AH
> Spares and probably others.
>
> Are all these heads the same? Is one better than another?
>
> Is there any performance gain from the aluminum head?
>
> Many thanks for help,
>
> Tadek
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