Propane Injection?
 

Hey, I just got 2004 E-350 van. It's a company truck that I have 24-7. It's got the new 6.0L diesel. This thing smokes!. Since I don't own the van I'm going to install propane injection. Is this a smart thing to do or will I get fired

Well, since it's not your brand new van, I think you better get permission first and let it break in before you do ANYTHING. :)

I'd ask because there are some other things you should do even before you consider that. Namely exhaust and gauges

haha thats funny thats gonna cost prolly more then 2 or 3 weeks worth of work
get a chip better its easier to install and uninstall so your boss dont see you messin with the van

You can either do it the right way or the way your proposing....