Magnum engine from 1992-95 are OBD-1 and used a hydraulic 4sp transmission with converter lockup and overdrive toggled on/off with a simple 12v circuit operated by the ECU.

96+ went to a fully electronic transmission and OBD-2 at the same time. For this reason neither the electronics or transmission will swap between 92-95 and 96+.

The BEST thing you could do is swap a 92 dakota engine wiring harness into your 91, and hope and pray the connector at the dash stayed the same. Alternatively you could swap out all the wiring(dash board, lighting, etc) if you wanted to avoid rewiring stuff.

I used a 1995 harness/ecu for my swap, I found the engine wiring harness section is remarkably self-contained once you gut out the lighting, abs, etc. All that's left to hook up is a power, ground and a keyed power. You will need a speed sensor hooked up or you will stall on decel.

The early magnums will want around 35psi of fuel pressure. The TBI's were more like 14 and the 96+ units went to 55 I think. Oblivious to this fact, I first installed a 55psi GM LS-1 fuel pressure regulator/filter because they are easy to retrofit to just about anything. It ran, but rich so I put smaller injectors on to compensate.

The OBD-1 computer doesn't care what transmission you put behind it, so long as its hydraulic. If you put a 3sp behind it, you may get a code for overdrive and lockup circuits open, however it won't affect driveability. I have a stick shift so I found a stick shift ECU for mine so this isn't an issue for me either way. If memory serves, the OBD-1 magnum ecu does have a circuit that tells the ECU if you're in gear or not, however I'm not sure what the function of this is, perhaps to cancel cruise control if you nudge the shifter into neutral?

You will have to transfer over your LA sensors for your dash gauges to work. Also I wouldn't expect the a/c connections to be the same but not sure on that as I don't have a/c in my swap.

What about the engine mounts? I've heard a lot of conflicting stuff about it.

2. Luckily dodge kept the motor mount ears cast into the block all the way thru 2000 on the 318 and 2003 on the 5.9. Just need the brackets which you should already have on your LA

So I have a chance to buy a 2001 5.2 with 27k miles on it that was in a fire and melted all the electronic connectors. If I bought that motor could I not just swap the sensors, distributor and the TBI (with drilling the magnum heads for LA intake) and have the current system run the engine?

What would be the absolutely easiest thing to do to make that engine work in a 91 dakota?

I have a 5.2 sitting at my house if you want to pull the intake and what wiring is left on it the motor was pulled from a 94 jeep just pm me you can have it i was saving it for a spare for my truck. I live in south stafford

I appreciate that, if something comes up I will def take you up on that. Right now I think I have everything I need to do the job.

My worries are motor mount issues (since this engine is a 2001) Someone said "up to 2000" they kept the block casting the same as far a motor mounts. Hopefully that isn't going to be an issue.

I'm going to try to make an adapter for the LA intake bolts so I don't have to re-drill the magnum heads. I've read you can drill the intake manifold and make an angled spacer to let the bolts run strait down.

One other thing I wondered if it's possible to just swap the TBI assembly onto the magnum intake... I haven't looked at it that closely but I just wonder if there is some way to make an adapter or something to just use the Keg intake with the 91 TBI.... Obviously you would have to block off the injector holes.

I have a 2001 5.9 and it still has the old style mounts on the block. It also has the newer style mounts on the block.

You'll be looking for a 95 or older 42RH or 46RH.

You don't want to put the TBI on the magnum intake. The magnum intake is designed for dry flow only and putting a TBI on top will give you an engine that runs like a bag of crap. You could put a propane mixer on there, because it's a gaseous fuel.

You'll be looking for a 95 or older 42RH or 46RH.

You don't want to put the TBI on the magnum intake. The magnum intake is designed for dry flow only and putting a TBI on top will give you an engine that runs like a bag of crap. You could put a propane mixer on there, because it's a gaseous fuel.

You'll be looking for a 95 or older 42RH or 46RH.

You don't want to put the TBI on the magnum intake. The magnum intake is designed for dry flow only and putting a TBI on top will give you an engine that runs like a bag of crap. You could put a propane mixer on there, because it's a gaseous fuel.

What about aftermarket intakes? Any real benefit to putting something like the AirGap on there and fitting the TBI to it? Does an adapter to do this exist?