----- Original Message -----
Sent: Tuesday, November 19, 2002 1:00
PM
Subject: Re: [Chevelle-List] Vortec
Heads
Dan,
Vortech heads will fit on all SBC blocks. Your
exhaust manifold/headers will bolt right up, but you will need a Vortech
specific intake manifold, since the bolt pattern is different. Head gaskets
are the same. Self aligning rockers are the same as regular rockers, but have
shoulders on the end that contacts the valves so that they stay centered on
the valves. All late model SBC with hydraulic roller cams/lifters use them
instead of guide plates. They are available in roller or stock configurations
from GM, Comp Cams and others. One of the drawbacks to the Vortech heads is
that without machine work, you cannot run more than 0.5" lift on your cam.
Also, you cannot run high performance valve springs unless you have the spring
pocket enlarged. You can buy the heads with these mods already done from
Scrogins Dickey Chevrolet and others.
Bob Walton
Maryland Chevelle Club
72 SS
71 Malibu
----- Original Message -----
Sent: Monday, November 18, 2002 8:21
PM
Subject: [Chevelle-List] Vortec
Heads
Hi,
Has anyone used the Chevy Vortec heads on an
older motor.
I was wondering a couple things about them,
such as:
Will my stock exhaust manifolds bolt
up?
Do I use regular head gaskets?
In the Jegs book, it says to use self aligning
rockers, yet I don't see any listed.
What are self aligning rockers? Is
this another term for roller rockers?
Is there really any performance gain to be had
over stock old school heads?
Any input will be appreciated. Thank
you.
Dan McIntosh
64 Impala SS
