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Please could some one give me a list of what I would need to convert to vortech heads if I could get some what of a parts list I would appreciate it. What type of compression ratio would I have say with flat tops or with dished stock pistons.Any and all help appreciated. Thanks in advance

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Proud owner of a 66 chevelle. later, Nick a.k.a POPS
Member #387

 

[72CHEVELLE]

I asked the same question before. Here's a clip from an email sent to me from Tom Harold, aka TH (thank him not me ---> [email protected] ):

1.Heads: $400 or $425
2.Intake: $180
3.Vortec intake gaskets (specific to new heads): $25 (but you can reuse
these babies quite a few times)
4.Vortec stock self-aligning rockers: $50 (you can now get roller and roller
tip SA rockers. We had ours machined for screw studs and plates and went
with standard roller tips. I do not think that money was well-spent there.
It helps, but may not have been necessary. If you're on a tight budget get
the stock rockers.)
5.Cam, chain, lifters, springs, retainers: $300 (this depends on your cam
lift, as mentioned above. Only thing I gotta add: GET A MATCHED CAM AND
VALVESPRING SET! We got some stiff springs from one manufacturer and
standard cam from another---killed that cam upon startup. We pulled the
motor, tore it down, remachined it, put it back together with matching Comp
Cams parts, and it runs wonderfully now. Match your valvetrain components.)
6.Centerbolt valve covers: $30 (used, stock--Summit has chrome ones for
about $40)
7.Bolts for valve covers: I don't know 'cause some great parts counter guy
here GAVE me them!
8.Valve cover gaskets (specific to late model heads---can also be reused):
Ah, I forget. $20?
9.Intake bolts

Hope this helps a bit!! Good luck!

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Jeremy J. Bennett
Team Chevelle #298
www.chevelles.com/showroom/72CHEVELLE1.jpg

 

[L6571SS]

You need....

1) Special intake for the differnt intake runners and differn bolt pattern, Edelbrock makes 4 differnt styles. GM has one but the price is insanly high.

2) Self alighning rocker arms, stock ones won't work unless you get screw in studs and guide plates.

3) Centerbolt valve covers and bolts.

4) Head gasket such as the GM stock replacement. Or Fel-Pro part #1094 wire shim gasket.

5) Special intake gasket that snaps to the heads to keep it in place. This gasket is usable over and over again. Get the GM on because Fel-Pro is a one time use and its hard to get into place.

6) New valve springs, if you plan to run over a .460-.468 lift cam. You may also need differnt retainers to clear the valve seals.

The vortec heads have 64cc chambers. That with the OEM wireshime gasket and 4 relife pistons you'll have 10.2-10.3:1 compression. With the Vortecs this is very do-able with pump gas and not hurting you timing. In fact I have a friend running 10.3 with midgrade. Mine right now I have 10:1 but I'm putting a thinner gasket and mine will then be close to 10.6:1. If you do not want to run that much compression you can get thicker head gaskets to drop it to 10:1 or you can get dished pistons to get it down to 9.5:1. Those #'s are if you are running them on a 350. That should do it.

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JT
71 SS Vortec 355
www.angelfire.com/co/KellyMotorsports

 

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Wow thanks guys for a more than excellent response!! Thanks again!!!

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Proud owner of a 66 chevelle. later, Nick a.k.a POPS
Member #387