The flange on CAT headers match the early 351 Windsor head, not the the
smaller 260 or 289 head. The FelPro 1415 gasket is used for both. The shape
of the port in the gasket is the shape of the port on the headers.
Most aftermarket aluminum heads are also patterned off the 351 Windsor head.
Buck Trippel
----- Original Message -----
From: "Allan Ballard" <allanballard@att.net>
To: "Beamclub TIGER" <tigers@autox.team.net>
Sent: Thursday, January 06, 2011 11:52 AM
Subject: [Tigers] CAT Headers and alum heads
> The aluminum heads I am looking at have square ports.
>
> The square ports are approx. the same size on all sides as the long side
> of
> the rectangular ports on a stock iron 289 head.
>
> Can the ports on CAT headers be enlarged?
>
> Is there enough 'meat' to grind them out to match larger ports on an
> aluminum
> head?
>
> Allan Ballard
> MK1-a Tiger
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