CRAMAR
Well-Known Member
I am thinking about putting a 5.9 magnum where my 318 is.It's in a duster.Will the exhaust pipe fit the magnum manifolds or will i have to get new exhaust?
340 MANIFOLD VS MAGNUM MANIFOLD ?
- Thread starter CRAMAR
- Start date
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You will not be able to use the Mag manifold on driver side. It sets to low and will hit the steering box. you can use the passenger side. outlet position is changed so most likely you will have to change the head pipe.
Treblig
Well-Known Member
The 96/97/98 jeep grand Cherokee V8 passenger side manifold will fit real nice and give you flow that is close to the 340 HP manifolds. On the driver's side use the 70s 340 driver, it will fit with P/S or anything else you might have on your engine.
And TTI makes pipes to fit different manifold numbers. They may not work with your exhaust depending on what it is but could probably be modified.
Ask and ye shall receive! Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists
I bought my repro 340 exhaust manifolds from Shaker and they were $600.
Treblig
Well-Known Member
360 magnum Jeep grand Cherokee passenger manifold - $60
340 HP 70s driver's manifold $150 -$100
Just working now on putting a set of 68 to 70 340 manifolds on the EQ Magnum heads. There is a mismatch on the ports that have to be corrected. Not only are the center ports wider but the lower portion port on the exhaust will not seal on the exhaust flange on the heads. Time to make up some flange adapters or do some welding on the exhaust manifold.
I was looking to do the same thing with the 360 EQ heads and the repro exhaust manifolds. Has anyone else experienced this problem and would the edelbrock heads be the better way to go eliminating this port mismatch? Maybe the Indy MA-X heads, but looking at their picture might be the same problem.
$695! Whew, proud!
Yes but available. I gave seen nice used ones go for just a bit less.
The Edelbrock LA heads will not accept the 68 to 70 Hi Po exhaust manifolds but I have not tried their Magnum head with the manifolds.
Shaker Hood still has these manifolds for $600.00
I believe that Tom from Rocket Industries is looking after the business after Ben Snobar passed away.
Treblig
Well-Known Member
I've never tried to install 340/magnum manifolds on EQ heads but an adapter should work if it doesn't push the manifold too far out away from the engine causing interference????
Just making the plates up today out of 3/32 thick 2 1/2" flat bar.
Going to try steel on cast iron with high temp silicone as the sealer.
Treblig
Well-Known Member
Steel on cast shouldn't be a problem....drag racers have been doing it for decades. I would use the EQ gaskets and the 340/magnum gasket on the respective surfaces....but that's just me. Silicone will give you a little more clearance, but you may not need the extra clearance???????
leblanc
member 2883
If you boost power a bit 2.5'' exhaust might not be a bad idea too.
That was the plan to use the 340 heat shield gasket but have not made my mind up on the other side.
Complete 2 1/2" exhaust going in with a cross over pipe
leblanc
member 2883
Bronze Barracuda
Well-Known Member
So I just picked up a 9376 passenger side exhaust manifold. Will it fit a 74LA head? Without making special plates that is?
Treblig
Well-Known Member
Never tried it on a '74 but it work just fine as long as it's not a early A body. I plug the small gas ports below the exhaust ports.
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