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I think the intake bolts aren't cut the same...can't remember which, but one is cut at an angle, and the other is cut straight. You might be able to machine the block to accept the newer intake, but I'n not sure about that.
I was looking at an LA style long block for dirt cheap but passed on it since I don't want to deal with any extra headaches when i swap the motor.

If you are able to have the truck down for a week or so, you may be able to diagnose what the problem with the magnum block is.
Sounds like a head gasket / cracked head.
How many miles on the magnum engine?
What engine is in the truck now 5.2 or 5.9?
 

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To elaborate on what was said above: the ignition system is also controlled by the PCM, this means you would need to have the complete ignition system from the 85 motor, then you could start splicing. In short, it would take more work that it's worth to try and make the 2 systems work.

And the tranny is 46RE(lectronic), the 46RH(ydraulic) was in the 94 (and maybe 95) model.

There would not be much involved in swapping components though. If the engines are the same size, and you can bore the newer block the same amount to clear the cylinders, then you could swap the new components into the magnum block. It would involve pulling the rebuilt 5.2 apart, having the magnum block completely apart & machined, then installing the new parts...minus the cam, intake, and carb.

In my opinion, it would be easier (and more simple) to sell the rebuilt engine and rebuild the magnum with a basic kit.

You have 250k+ miles on the original motor, don't you think it's worth the investment if you get the same service from a rebuild?
 

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^ you would be a retard to swap in a 5.7 or 6.1.
:stu:

barnettzack: Even if you could find a junkyard Hemi for that amount, the amount of funding for the swap does not justify the gains...$3500 (cheap) for a junkyard Hemi, $400-$500 fabrication/adapters/etc to get it working.
So on the cheap side, he could swap in a Hemi for about $4500, that's not even bothering about swapping the tranny, lengthening the driveshaft, bell housing adapter, etc...that would add another $500 easily.
Take a look at what RM_Indy has done with his ride.

cloise could stroke the motor he has out to 408 cid for about $1600, rebuild the top end nicely for another $1200, all the other odds & ends would bring it up to about $3000 for a complete rebuild.
The 408 would make more torque, probably about the same horsepower as a Hemi, and it would be reliable.

Having driven several Hemi Rams, they aren't that spectacular. They make all their power in the higher RPM range, not good if you go off roading.

It would be different, but not practical.
 

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computer, since it's already assembled, it should have the correct harmonic balancer & flywheel.
So yes, it should drop in, assuming the tranny's are the same, which they should be (46RE).
With 82,000 miles on the tranny, you could still be looking at a rebuild around 100,000 depending on how it was driven previously.
 

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I think that I will leave the engine in the truck and just rebuild the bottom end with a head job.
good luck on rebuilding it in the truck, it would be easier to drop the driveshaft and pull the engine & tranny as an assembly.

If all you have is a blown head gasket(s), that's an easy fix.
 

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sounds like good advice. I'd follow what he said and see what you come up with.
With good compression, I wouldn't give any more thought to replacing or rebuilding that motor.
 
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