Ok.. I know an NB will fit an NA. But it doesn't also work the other way. The NA tank looks taller and has a cutout for the spare.

I'm interested in the NA 12.7, bc a new one is very reasonable.

Thanks in advance

 

I put a NB tank in a NA. It took cutting the tank part of the trunk from both cars and welding the NB section in the NA. I think the other way (NA in NB) would just be bolting the tank in. Not sure if the NB fuel pump hanger will fit the NA tank. Never tried that. The vent line hook ups may be different. A stock PCM may throw a CEL if there are differences in the emissions equipment.