Don,
I looked in my Chevy by the Number, 1965-69 and Chevrolet Small-Block V-8
nterchange Maunals. The only reference I can find to oval ports is on a
big-block. Chevy by the Numbers says "Oval ports were used on low and
medium performance engines. Square ports were used on high performance
engines for better airflow."
Head#3856206 was used on a 396 w/ 325 HP in 1965-66
Head#3872702 was used on 396 (325 and 360 HP) and 427 (390 HP) in 1966
Head#3917215 was used on 396 (325-350 HP) and 427 (390-400 HP..incl.
Corvettes) in 1967-68
Head#3946074 (Aluminum) was used on the Corvette and Camaro 427 in 1969 (430
HP)
I don't know about other year engines. Hope this helps.
Jon
'53 1/2Ton w/ 1967 327 (square port)
----- Original Message -----
From: Don Simmons <tasimmons@cbnn.net>
To: <oletrucks@autox.team.net>; <60schevy@topica.com>
Sent: Thursday, May 03, 2001 7:38 PM
Subject: [oletrucks] Hedders
> Now I am beginning to feel stupid! I talked to my brother who has a 327
> sitting in his garage and the heads have the same square ports as my 350.
Are
> there any chevy heads that have a round port or is Hedman full of crap(to
put
> it mildly)? Thanks,this is really starting to frustrate me.
>
> Don Simmons
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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