A guy that lived around the corner from me growing up as a kid had a factory Hemi Dart called DeRosa's Dodge. I stopped by his garage one evening after he had fired up his car and woke up the neighborhood and noticed that he had a set of Gebler headers on that car. They were a work of art.

Anyway, here's more info:
http://www.tributes.com/show/Herbert-Gebler-91463523