I have a 1991 Dodge D150 with a 318ci and 518 auto. and I think about doing a engine swap. Taking the 5.2L Gas Engine and puting the 5.9L Diesel Engine in. How hard would it be to do this swap?What Transmission would hold it? Is the 81/4Rear End good for it?

 

mmmm.... i think u would need the whole drive terain(spelling jus woke up) , and calculate the the frame wouldwithstand that heavy *** engine and the suspension would need to hold and um oh yea also hold the hp/tq.
to much work and money
buy a new one.
those are jus some things to think about. and thats not covering all.

 

I know it will fit because there is the same truck down the street from me. Need to know what Motor Mounts, what kind of Transmission will bolt up, and will my Rear End hold. How muchheavier isthe 5.9L Cummins Diesel then the 5.2L V8 Gas Engine.

 

The engine is about 400 lbs heavier and the trans is about 100 heavier.

Considering that we are running 11 1/2" rears and I have a buddy that has twisted the axles shafts under some fairly mild mods, I would say that 8 1/4 will be toast.

Like anything, it could be done, but you are gonna be in for a HUGE task.

Swaps like this are better done with a truck that already has stout components, like a 3/4 or 1 ton gasser, or a Cummins into Super Duty swap, etc.

Stuffing an 1100 lb engine and a 400 lb tranny into a 1/2 ton truck damn near puts it at GVWR.