1974 Duster not starting.

You misunderstood. Which fuse "in the panel" are they?

You can download a shop manual for free, here:

http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617

and more manuals and more info here

http://www.mymopar.com/index.php?pid=31

This will tell you whether the "hot buss" is alive or dead, and by turning the key on / off, whether the "accessory" buss is alive or dead.