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EQ or magnum heads with Manifolds

Posted By: AdamR

EQ or magnum heads with Manifolds - 08/10/12 08:09 PM

Is anyone running EQ or factory Magnum heads with exhaust manifolds ? My motor has a set of worn guides (73 Duster 318 and I dont want to put money in to the stock 318 heads but I also dont want to run headers.
Posted By: Supercuda

Re: EQ or magnum heads with Manifolds - 08/10/12 08:15 PM

Quote:

Is anyone running EQ or factory Magnum heads with exhaust manifolds ? My motor has a set of worn guides (318 and I dont want to put money in to the stock 318 heads but I also dont want to run headers.




I'd venture to say there are probably a couple of million Ram trucks out the running stock magnum heads with exhaust manifolds.

So I am not sure what you are asking here.
Posted By: AdamR

Re: EQ or magnum heads with Manifolds - 08/10/12 08:18 PM

Im looking to run either my stock 73 318 manifolds (for now) or swap to a set of 71-73 340 manifolds. Im trying to keep the car stock looking. Obviously magnum truck manifolds fit.
Posted By: Supercuda

Re: EQ or magnum heads with Manifolds - 08/10/12 09:27 PM

Well, I have test fit magnum exhaust manifolds on my 65 273 and my 87 318, had to grind the head a bit on the 87 where the rear most air injection port is and needed to plug the air injection ports, but they fit. I'd venture to say they'd fit the other way as long as you do not have exhaust manifolds with air injection ports. since those will not be covered.
Posted By: GO_Fish

Re: EQ or magnum heads with Manifolds - 08/10/12 11:33 PM

I've been running early 340 manifolds on stock magnum heads for a few thousand miles with no problems. The top and both sides of the LA ports are almost the same as the Magnum. Biggest difference is the port floor is raised significantly on the Magnum. When you mate the 2 together, you will see there is only about 1/8" of common sealing area at the floor of the port. This can lead to leaks at the bottom of the ports. If you have any trouble you can use Remflex exhaust gaskets, they will seal between the 2.
Posted By: AdamR

Re: EQ or magnum heads with Manifolds - 08/11/12 12:04 AM

Thanks Scott. I knew there was an issue with the port floor being lower, Wasnt sure if it caused a leak.

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