I used to own 93 #187. It was a heavyweight car and had the fuel filler extension.
The easiest tell is how many gallons you put in when filling up.
If the tank is near empty and you are able to put in only like 15 gallons, then your car is a heavyweight.
If you can fill ~18 gallons from empty, then your car is a regular weight car.
Sent from my iPhone using
ZR-1 Net Registry