CNG to gasoline conversion

I just got a good deal on a low mileage CNG B2500 van from the Federal Government. Since I hear they only go 100 miles on a fillup, and CNG is hard to find, I am planning to convert it to gasoline.

Does anyone know for sure what is different on the CNG motor?
Fuel injectors?
Catalytic converter?
Engine computer?
valves?
oxygen sensors?

Obviously the fuel tank, lines, pump, and pressure regulator will be different.

what year is it i do believe everything mentioned above is different and possibly more

what year is it i do believe everything mentioned above is different and possibly more
1996 5.2L. It's tough to get information. I went to www.rockauto.com and www.partsamerica.com Both of them listed the same parts numbers for CNG & gasoline for pistons, camshaft, fuel injectors, oxygen sensors and computer. That can't be right. The computer would HAVE to be different. Camshaft is probably the same. I recall hearing that on Flexible Fuel Vehicles, the valves were harder and there was some kind of extra plating on the intake tract. I don't see any problem running better quality parts when you no longer need them. It would be a problem trying to go the other way.

I remember seeing different oxygen sensors listed for the alt fuel Caravn/Voyager, but did not see them listed for the alt fuel Ram Van. (This may have been a later development in second generation CNG vehicles).

Any actual information is very much appreciated.

I'm going to check on Dodge portal tech site and if nothing in there i will check books at work on Monday i remember reading about the differences don't remember where. Is this factory installed because this is the type i'm looking at and not aftermarket installation

Yes. This is factory installed CNG.
VIN 2B7HB21T7TK165872.
I am hoping to do this with wrecking yard parts, and was figuring to go after an entire fuel supply assembly (tank, fuel lines, pressure regulator, rails and sensors. I'd probably go for reconditioned fuel injectors, rather than used. I also assume that a CNG vehicle does not have a vapor recovery system and charcol cannister.)
I'm also curious as to whether a RAM pickup would use the same parts as a RAM van, and how many years before 1996 would have the same sensors. (I haven't checked yet, but I suspect that late 1980s vehicles will be a lot easier to find in wrecking yards than mid 1990s.)

i'm having problems finding this info it might of been in one of our master tech books that would have been tossed into the trash by now because of not using it but i will continue my search again tomorrow who knows i still may find something on it