'70 Duster Horns 1 or 2 ??

Did '70 340 Duster originally have 1 horn or did they always have 2? Mine has only 1 and see only one mounting hole...or am I missing something?? Thanks

Dual horns were an option on all 1970 Valiant / Duster models. See the page at this link;

http://www.hamtramck-historical.com/imag..._Duster0006.jpg

S - Standard

E - Extra cost option

Wasn't dual horns part of another package, like if you had the under hood pad or something?

Included in two option groups on this page;

http://www.hamtramck-historical.com/imag..._Duster0009.jpg

Thought I read that somewhere, gtreat sight btw T/A