The pentastar in my 86 5th Ave is very similar to the crystal pentastar on my 82 Imperial steering wheel. Each side on the 5th's pentastar is 5/8". Fifth Aves are plentiful and a tired one would be happy to have its pentastar live on in an Imperial. (Sounds like a story I read to my daughter...) Phil Brust Jefferson GA 73 & 82 Imperial