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Old 11-11-2006, 04:27 PM
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Vortec heads on Gen 1 SBC, what else is hidden?

I want to put a set of vortec heads on a 1975 engine. I know you need new intake and rockers and valve covers.

But Im not sure if I need new:
1. head (lenght) bolts?
2. new (lenght) pushrods?
3. can I use standard head/intake gaskets designed for gen 1?
4. vortec head have accesory holes correct, I heard that stock alternator braket wont work with certain manifolds?

anything else?

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Old 11-11-2006, 05:02 PM
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Its a true bolt-on, but I personally never re-use head bolts. For not much money you can get new ARP bolts.

Pushrods same
head gasket same
intake gasket different. not only is the bolt pattern different, but the vortec has slightly raised ports.
exhaust gasket same

Vortec heads will have accessory bolt holes. I've heard rumors of race vortec heads that didn't, but I doubt you have the rumor heads . I used a GM bowtie intake on my build and it did come with the bolt hole for the alternator. If yours doesn't, it should be easy to fab a bracket that goes to one of the intake bolts.
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Old 11-11-2006, 09:23 PM
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K, awesome.

Can I also use the rubber O ring valve seals for a Gen 1 head on the vortec?

And same spark plugs? or do I need shorter lenght ones?

Thanks!
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Old 11-12-2006, 07:19 AM
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Accessory brackets have different bolt spacing than your old heads but now you can run a serpentine belt set up.

Spark plugs are different, threads are longer.

Can still use the o-rings.
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Old 11-12-2006, 09:30 AM
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I have used this head gasket is several Vortec headded motors, and it has worked great.

http://store.summitracing.com/partde...t=NAL-10105117
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Old 11-12-2006, 02:16 PM
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Quote:
Originally Posted by Greg Latvala
Accessory brackets have different bolt spacing than your old heads
? I thought Ive seen many vortec heads using old style brackets(power steering, the alternator) it was just that I heard the upper alternator bracket had problems with the bolt hole on manifold

Last edited by Warrant; 11-12-2006 at 02:43 PM.
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