Originally Posted by MarinBlaine
Hi jeff, congrats on your van and project! How will this all work with CA emissions and smog check?
It's been a long time since I looked into the specifics, but from what I remember, you are O.K. doing a gas-to-diesel swap provided that the MY of the engine is equal or "newer" to the MY of the vehicle it is being placed into, and still retains -all- factory-equipped emissions systems.
I have heard some smog/emissions refs are easier to get the paperwork done than with others (To make it "officially" powered by a diesel).
Puts the '97 vans into a great position- they can use just about anything (12v, 24v, commonrail, 7.3L, 6.0L) and
be smog exempt in the state of CA. I can't remember if the motors had to be from the same manufacturer, or if you could mix and match dodge with Ford. Don't think I've ever seen or heard of a duramax swapped E-series.
Having a '97 with a 5.4L, I've long wondered about the prospect of a 24V or commonrail with a 'modern' transmission... but already having a Quigley conversion, I'm sure that shoehorning a diesel and big transmission in, in place of the 5.4L... Probably better off finding another 1997 van with ridiculous mileage/blown motor for cheap and starting there than ripping apart a perfectly good van.