I knew this going into this project, but did not anticipate this - the later model SD one plans on dropping a 12v Cummins into the more complications one can expect. I chose a low mile, one owner Lariat 2006 F-250 CC RWD 5.4L for the Cummins conversion thinking it should be relatively simple and not loaded up with beau coup electronics. I was mistaken.

We pulled the cab and bed off the 2006 RWD and dropped it all onto a 2008 diesel F-250 FWD frame with original suspension and axles after installing 12v and ZF6 in '08 chassis. We pull the instrument cluster and install tach, speedo, and gauges from Classic Instruments because the stock tach and speedo weren't going to work. Then we discover that the AC and all accessories are run through the instrument cluster, so nothing was working. The shop has worked through all that now and the only item that doesn't work (so far anyway) is the radio staying on until the door is opened after the key is turned off (which I have no need for anyway).

So if you're wanting to swap a 12v into a Super Duty then I would suggest doing your due diligence on what to expect with gauges, instruments and electronic stuff.

 

I'm picking up an 08 superduty tomorrow, had a 6.4. putting a 5.9 12v in it. Being you are fresh off this job, maybe you can answer something for me.
I was curious about the engine harness. I don't have the 6.4 engine harness, but in reality, all I'm going to need is oil pressure, coolant temp and on/off(which I could cheat around if needed) and start signal which may come from a different harness, I'm not sure yet on that. And then AC might be the only other thing I need from the truck, and some of that may not be part of the harness from the PCM.
I'm just trying to have it start and **** off with key like it should, and I'd like oil pressure and coolant temp gauges, and alternator gauge. I will probably pick up the tach kit but I don't really care if the tach works. If it's too complicated or expensive I can live without it. I'm not sure what other gauges the truck has but I will know tomorrow. Boost gauge could be handy but not that important to me. And I plan to add a pyrometer, probably a mechanical one. I'm wanting to keep this pretty basic as the engine is mechanical and I don't want to over complicate it. I'm running a manual transmission so I won't require computer activity to shift an automatic. I'll have to adapt backup lights and speedometer.
I will likely find out that this is more complicated to pull off than it appears 😂. Just curious if you have any tips.
Thanks 👍

 

Haven’t been to this section for some time so I know this is answering a old post
I have a 04 model F-450 that we did a 12v swap to in 2013, all of my factory gauges work, tack is off a little but that was the tone wheel I installed and haven’t bothered to change
AC clutch engagement is controlled by the pcm that looks for a signal that the engine is running. I think it looking for two separate signals from the crank and cam sensors, on mine they are both tied together

 

We went through a learning curve on getting the gauges to work, ended up with all new gauges from Classic Instruments.

 

We didn't find out about Swaphelper.com until after we had the Classic Instruments gauges in, if we'd have known about Swap Helper we would've gone that route.

 

I used my ford harness and sensors, just mounted them on the 12V engine, ac signal and everything. Only thing I never got finished with was the cc.