not an expert. but if its not EPA certified for US it would have to be certified before it could be 'released' from customs or whatever entitiy holds it as you try to bring it back in.
to get EPA certification on a vehicle, a government certified or licensed or whatever entitiy would have to perform the modifications/certifications. Seems like I heard that such companies have to be certified for specific vehicles. In other words you cannot take a CRD jeep to someone who does ferraris if that does not have qualifications for diesel jeeps.
i have been somewhat interested in mercedes smart vehicles. there are a few, perhaps one place in the US currently that performs mods to smarts that makes them OK for US importation. i heard this on a board where someone wanted to bring one in from europe or canada and was tyring to find out how.
btw it is very expensive to go through the process.
finally your best bet, and still really expensive, might be to take a gas jeep and purchase a diesel drivetrain and have a very competent mechanic covert it for you. of course this will cost you mega bucks too. and then you must be aware of what your local smog laws are. do you need to get resmogged once a year? if so, how you gonna do that with a diesel?, temp convert back to gas? or you move to a state/county/city where they don't smog vehicles...
if fuel costs keep up, i expect to see clean diesel vehicles start to pick up in 2008/2009. perhaps an effort to get congress to ease diesel pollution laws would help too. since ultra-low sulfur content diesel will be nationwide by the end of oct, the only thing sticking in the epa craw is the particulate issue...
AEV sells a CRD conversion for the TJ... They also have a TJ Hemi conversion.
DC has a proving grounds about 250 east of Chicago, right off of I-94. I grew up in the area and you would see stuff like that all the time. THe Manufacturer plates are a giveaway that its a DC experiment.
'00 XJ Classic > Stock DD
'88 Grand Waggy - Bone stock pseudo-barnfind
'78 CJ5 - Under minor rehab