Magnum Exh Manifold options

[snowmann]

I’m looking for a little information from the experts in here. Way back in the early 90’s I put a set of Magnum exhaust manifolds on a 340 truck project I had. Just basic 1.88 heads and I don’t recall the exhaust ports being hogged out much if any. The gaskets and manifold ports weren’t a perfect fit to the LA ports but I ran them anyway. Fast forward a couple thousand miles and it burned a small section of the gasket out, and it was a repeat performance every couple thousand miles. I want to say it was the outside ports but don’t recall.

I am building a 72 Scamp project and at the point where I need to select an engine for it. I am considering a magnum engine but I know the Magnum manifolds won’t fit in that body.

I have looked around and some people say the LA headers and Exhaust manifolds work on Magnum heads and some say they don’t. I don’t see any headers available for the “A” bodies that specifically say for "Magnum engines only".

For magnum swapped engines, what are people using for manifolds/headers? If using the LA headers, are you having issues with burning out gaskets?

 

[abody]

LA headers with a small amount of massaging and remflex gaskets will work, have been using this set up for 4 years and no leaks

 

[rklein383]

I put headman shorty headers on my magnum. I had to grind down the truck motor mount boss on the driver side. The 408 is in my 71 Barracuda. I think they would work in an A-body as well. Rod

 

[TrailBeast]

LA headers with a small amount of massaging and remflex gaskets will work, have been using this set up for 4 years and no leaks

Same here, no problems at all and the remflex gaskets were even used on the previous motor with headers.
On my last motor I had a busted off stud on the rear drivers side so that is when I got the Remflex gaskets and it never leaked.
Just can't recommend those gaskets enough for headers.

 

[aaadave]

iv'e got an 01 magnum in my 72 swinger. truck manifold fits the pass. side, but used a 340 manifold on the drivers side.

 

[MileHighDart]

I’ve got Doug’s d453 headers on my 5.9 magnum in a 68 Dart. Only had it up and running for a short time, so don’t know about burnout, but their sealing well so far.