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Old 02-08-2021, 09:00 PM   #14
jocko
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Join Date: Oct 2009
Location: Godley, TX
Posts: 17,975
Re: Budget Vortec Head Upgrade

Here's how you can run original valve covers:
https://www.ebay.com/itm/Speedway-Ce...ss!76028!US!-1

https://www.ebay.com/itm/SBC-Valve-C...rd!76028!US!-1

Note that some have a rubber seal that in a machined slot while others use dual gaskets above and below the adapter. I'd be interested in hearing if anyone has used the rubber seal in the machined slot type as to whether there were any leakage issues. I'd "think" they'd be less likely to leak than stock gaskets, but then again, not sure how rigid the adapters are. I have a couple sets of actual GM adapters that I plan to use - found them at an old Chevy dealer near where I grew up - called the lady behind the parts desk, she even knew some of my relatives, and boom, they were in the mail. GM used to make these adapters shortly after the vortec heads came out, but I don't think they still do. From what I could tell they are identical to the ones offered by Speedway.
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