From the looks, the offset is correct.

 

So 45mm is fine?

 

No I dont "think" you are running 45mm offset wheels.
The correct offset should be 30mm, and thats what it "looks" like in the picture you posted.

Better to be safe than sorry and just measure, I hate to just go buy a pic

 

You just finished the bodywork on your '67 Ford and don't want the 14x5.5 wheels, you want the 17x8 chrome wheels to finish off the look!