I do not have any seat belts in the back seat of my 68 Roadrunner and I would like to know the best way to install some shoulder belts in the back seat. Where is the best place to get them.
Thanks for your help.

Don't think they ever came w/them in the back seat

http://www.andoverrestraints.com/

3 point belts in the rear were an option..at least I know chargers did. saw a pic of one over at dodgecharger.com

If you peek at your package tray from underneath in the trunk...you can see the slotted holes stamped in it.

I used these to add 3 point belts to the back of my 68..check it out.
http://www.dodgecharger.com/forum/index.php/topic,11621.0.html

and for pics of a factory installed rear shoulder belt....

http://www.dodgecharger.com/forum/index.php/topic,55458.0.html