Originally Posted by IanF
This is such an amazing build. Congrats to you for making it happen.
Is there a substantial difference between the engine bay room of your 2013 and say... a 1992 van? Would a 12V Cummins be easier to install? The idea of a 12V/Allison combo (2WD) in my current van is enticing... But my biggest issue would be finding the space to do a conversion like this. I barely have enough garage space for my little British cars...
12V would be simpler from a wiring perspective but also challenging in other ways. The engine bay is wide enough and deep enough for a Cummins to fit pretty well (with plenty of room to work on it) however at the front of the engine is where things get tight. I chose to push the radiator/intercooler forward and that wasn't so difficult with the '08-up front end. I had to make some custom parts but at least there was a place to fit everything. With an earlier van, there's not as much room to work with at the front core support/grill area.
The other challenge is the height of the engine. I took the body off during my swap. There may be a way to get the engine in without lifting the body (like maybe taking the head off to lift it up and set it in from the front) but I haven't looked to far into that.
The Cummins/Allison combo is pretty amazing in the van.