The original specs are sometimes dated. Best results will be with the maximum positive caster with a slight (very slight) negative camber (1/8 degree or so) and about 1/16" toe-in. Play with the caster to compensate for road crowns (a little more on the right)
I have shop manuals with factory specs. I don't like the way the factory measure ride height (too hard to check). I measure the distance from the LCA to the frame and like to have about 1" between the LCA bumper and the frame. I can post the factory numbers later.
I have a 70 Duster and have been looking for frame specs for it for a while with no luck. It use to be a race car and is more that likely twisted some. I would love if you could post your Demon specs or please
e-mail them to me. Thanks very much.