That's interesting, since when I brought my Canadian Viper south, there was no word of it being a one-way trip. The seatbelts in Canada for 92-96 required floor mounting so the car had what the US sees as the airbag seatbelts; both ends on the floor and roll-up over the inside shoulder. For the same year in the US the belts roll-up into the doors to meet the "automatic" requirement. (You are "automatically" protected if you never unbuckle, since you can open the door and get in if you leave the seatbelt buckled.) I suppose that's why airbag cars are legal in Canada, since both ends of the seatbelt are on the floor.
It came with DRLs, the same harness is used for norht or south of the border, there's just a plug-in box for the DRLs.
There was no exhaust emission change required, the EPA agrees that US and Canadian versions are the same.
I've had the front fascia off and there is no part that isn't identified in the service manual. It has the urethane fascia, the styrofoam form underneath, and the fiberglass bumper under that. Then it attaches to the frame ends...
I'd love to know more about this.