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Old 03-20-2017, 01:17 PM   #4
BILT4ME
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Join Date: Jul 2016
Location: Olathe, KS
Posts: 267
Re: Correct Factory Exhaust Manifolds 70 GMC K2500

Quote:
Originally Posted by Ol Blue K20 View Post
I'm not sure on the part numbers but Dormin remakes them. They're ramhorns with straight dumps.
Yes, but the Dorman quality has suffered severely in the last few years. The ID of the standard ones are smaller ID and they ALL include the A.I.R. ports and I don't want that.

I am looking to install CORRECT manifolds for this truck, with the exception that I am eliminating the heat riser on the bottom of the manifold. I do not know which side originally had the the heat riser, as the truck that we have has been cobbled so much, I am not sure what is correct and what is not.

I want to be able to make this a pseudo-restoration, as we have most all matching numbers for the main parts and the under-hood paint is still original and the cab/front is in decent shape.

We'll start there, then performance modify later.

Thanks!
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1970 GMC K2500
Dis-use is harder on a car than mis-use.
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