Question about center caps

Today, I got the answer...
1970 rallye wheels and up, have all the same rim profile.
Center caps can be interchanged.
I doubted because the 73 center caps are wider in diameter, but in fact,the only difference can occur between SBP and BBP.

So, I'm going to install '71 center caps on my '73 Dodge Charger rallye wheels set. :)