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Old 12-20-2004, 03:11 PM   #1
mt Al
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Join Date: Aug 2001
Location: Bozeman, Montana
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Exhaust manifolds for Vortec heads?

I know this must have been covered a bunch of times....wish I knew how to search past threads.

If I switch to Vortec heads can I use my stock exhaust manifolds?

I know I need a new intake, just can't remember about exhaust.

My truck has about 40,000 on a crate motor and me thinks the valve guides are leaking oil into the cylinder heads, making starting it a bit rough especially when its cold. Instead of fixing that, why not get some used Vortecs!? (Will my wife buy this?)

If I just want decent stock performance does anyone know what head numbers I should look for (not concerned about high lift cams).

Thanks again.
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'70 Chev 2wd farm truck
'71 GMC 2wd 1/2T 402 nice!
'72 Chev 2wd 1/2T 396
'72 GMC 3/4T 4x4 2500 Super Custom suburban.

Bozeman, Montana
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Old 12-20-2004, 05:37 PM   #2
gmc67swb
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Not sure on casting numbers, but they were standard issue on 96-98 trucks. You may need guided rockers as well. I'm using headers with mine, but I'm pretty sure your manifolds will bolt up.
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Old 12-20-2004, 08:13 PM   #3
Blazer1970
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Your original manifolds or any headers that are designed for the original V8 in your chassis will work.
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