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Topic Review (Newest First)
12-27-2010 05:02 AM
cobalt327 The '87-'91 'Vette aluminum heads were an exception- they retained the older intake bolt pattern.
12-26-2010 10:51 PM
curtis73
Quote:
Originally Posted by Torque454
The TBI stuff isnt even worth messing with are they?
IMO, TBI parts are like zits - once removed, why would you ever want to put that material back on? Just wrap it in a kleenex, throw it away, and sanitize your hands.
12-26-2010 09:52 PM
ericnova72
Quote:
Originally Posted by bondo
Ayuh,... Not to argue, but that's just plain ole Wrong....

The Intake ports are .200" Higher on Vortec heads, 'n the intake ports are Also....
Maybe you see it that way, but the water ports and intake ports are in the same basic location they have been in since 1955. Might be a little taller, wider, whatever, but if the gasket is big enough it will cover and seal. It is the bolt holes location, angle and number used that are majorly different and the thing that prevents swapping Vortec intakes for conventional intake.
12-26-2010 06:25 PM
Torque454 The TBI stuff isnt even worth messing with are they?
12-26-2010 03:08 PM
curtis73 Centerbolt heads refer to anything 1986 and later. They could be TBI heads

Quick rundown:
- old heads, 12 intake bolt holes, all are same-angled.
- TBI heads, 12 intake bolt holes, center four are at a different angle
- Vortec heads, 8 intake bolt holes, straight down angle.
- All heads starting in mid-86 became centerbolt valve covers.

Of those, you can swap TBI stuff with the older style but you have to wallow out the holes to match whatever angle you want.

Vortec heads are only cast in numbers that end with 062 and 906. Those two heads (what are referred to as Vortec heads despite the "vortec" name being used for 15 years) have the different ports and 8-bolt pattern. They are not interchangable. Period. You could make them work with about $1500 worth of welding, machine work, and modifications...
12-26-2010 12:12 PM
V8&4spd It's all wrong.
12-26-2010 11:03 AM
bondo
Quote:
Intake and water ports are in the same place but bolt holes are not.
Ayuh,... Not to argue, but that's just plain ole Wrong....

The Intake ports are .200" Higher on Vortec heads, 'n the intake ports are Also....
12-25-2010 05:33 PM
nobody_1250 k thanks for all the info
12-25-2010 05:23 PM
ericnova72
Quote:
Originally Posted by nobody_1250
well the intake has 12 bolt holes but the the heads it came off of had valve covers with 2 center hole mount, was i wrong to assume they were vortac heads (i couldnt get the numbers on those heads)
Those would not be Vortec, just common centerbolt valvecover heads. True Vortec heads have a 8 bolt intake pattern. If your intake has a 12-bolt pattern it will fit the 3932441 heads you have.
12-25-2010 05:18 PM
nobody_1250 well the intake has 12 bolt holes but the the heads it came off of had valve covers with 2 center hole mount, was i wrong to assume they were vortac heads (i couldnt get the numbers on those heads)
12-25-2010 04:36 PM
ericnova72 Intake and water ports are in the same place but bolt holes are not. Vortec uses 8 verticle bolts, non-vortec is 12 angled bolts. No interchange.

This is assuming when you say "vortec heads" you are referring to the 96-up Vortec heads that poeple are now using for performance, not the 86-95 heads off some of the engines with the name "vortec" on the engine covers but aren't true vortec heads.
12-25-2010 04:32 PM
bondo Ayuh,... The number as well of placement of the retaining bolts are very Different, 'n there's almost a 1/4" difference in the ports....
12-25-2010 04:10 PM
mud.man.rj
vortec

No they don't interchange, I think less bolts but the main difference is bolt angle. Still no. At least intakes are cheap.
12-25-2010 04:03 PM
nobody_1250
Will a intake off vortec heads fit non-vortec heads

I always seem to end up here when i google a motor question. so i might as well join.
My question, Is there a difference in intakes. Im goin from vortec heads to stock heads will the intake from the vortec heads work on the new heads? it all looks the same im just not sure on ports, water jackets an such.

a lil info
block cast 3970010 (.060)
new head cast 3932441
intake from vortec heads is an edlebrock high-rise air gap (the one i wanna use i think its a victor jr)

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