I have the 8077, it's rh starter location, but my headers will be facing forward, so no issue there.

Found this pic:

http://www.speedysgarage.net/challengerw...date_02_web.jpg

I think that's why I read previously a twin disc wouldn't work... cause the post was about using a twin built for a challenger thats on the left of the pic and they use a different style flywheel. I was thinking a 6913-07 mcleod would work and from that pic, it sure looks like it'd fit.