firewall gaskets

[johnny gags]

Ijust purchased a firewall gasket set and a body plug set for a 73 duster. When I received the box the body plug set was right but the firewall gasket set it is for 67-72. The invoice even had 73 duster on it. What is the difference between the two and can I use them? Motor is coming soon and I want to get going. Thanks

 

[RedFish]

There's prbably a difference at the heater case. Throttle and master cylinder would be the same. What else is there ?