Sure. But I'm also sure there are forums for them that are not this one.
A few come to mind such as:
https://chevytalk.org/fusionbb/showf...yword/ElCamino
https://www.jalopyjournal.com/forum/...-group.321560/
https://www.elcaminocentral.com/forums.php
The only reason I say that is the information here wouldnt help you and your information wouldnt help others who build drive 60-66 c or k type trucks.
I'd probably contact the forum and ask if they would start a El Camino section -
http://67-72chevytrucks.com/vboard/sendmessage.php
Wouldnt be a bad idea.