DEF required in what states?

You mean DPF?

 

Stay out of Commefornia.
Legal elsewhere, for now.
Def didn’t find about til like 2012.

 

Would not be able to add an emissions system to a truck and engine that wasn’t designed for it.
There was a company a while back adding DPF systems to trucks, but they gave up on it.

 

2000 is a great year for almost every engine manufacturer. Other than Cali you’re good to run it . Be aware a w900 won’t be very fuel efficient unless run very slow .. expect low to mid 5’s when figuring your fuel consumption.

 

If he has a Detroit in it, depending how he drives, he could get 7.

 

Don't take this wrong but are you really sure you should be on your own?

 

Isn't Detroit specific to FL?

The 2 w9s I drove had cat and isx

 

They weren’t exclusive to FL until Daimler purchased them. Prior to that they were available in all makes.

 

You need a 2010 and newer to come into the Communist State. Here’s a tip, you’re not ready to purchase a truck. Go get some experience first and learn what’s going on in this industry. By your post, you have absolutely no clue what’s going on in this industry’s. Can you say “Inflation” ?